JP2004122405A - Electromotive nozzle touch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the simplification of an electromotive nozzle touch device and the adaptability to a molding machine by partially converting the support shaft of an injection device to a ball screw shaft for nozzle touch. <P>SOLUTION: The injection device 1, wherein an injection drive part having an electromotor 22 as a drive source is provided between a pair of front and rear plates 9 and 10 and a screw built-in heating cylinder 11 is connected to the center of the front of the front plate 9, is provided by inserting a pair of left and right shafts 2 through the front and rear plates 9 and 10 so as to allow the plates 9 and 10 to freely advance and retreat. The regions where the rear plate 10 moves of the support shafts 2 are set to ball screw shafts 24 longer than a nozzle touch stroke S. Ball nut members 25 for connecting rotary members 26 are attached to the screw shaft inserting parts of the rear plate 10 in a freely rotatable manner to be threaded with the ball screw shafts 24. An electromotor 27 for nozzle touch, which rotates the ball nut members 25 to move the injection device 1 so as to allow the same to advance and retreat, is provided to the side part of the rear plate 10. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric nozzle touch device of an injection device provided on a pair of left and right support shafts so as to be able to advance and retreat.
[0002]
[Prior art]
In a hydraulic vertical molding machine in which the injection device is inserted into and supported by a plurality of columns, and the injection device is erected downward on the movable plate by the columns, the cylinder and the piston rod extend over the upper joint plate and the injection device. Is provided in parallel with the support shaft (for example, see Patent Document 2).
In addition, the injection device is inserted and supported by a pair of support shafts, the injection device is supported by the support shaft, and in the electric vertical molding machine which is erected downward on the movable plate, the movable plate and the lower plate of the injection device are connected to each other. The electric nozzle touch device including a ball screw shaft and a ball nut member is provided in parallel with the support shaft (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent No. 3090884 (page 2, FIG. 2).
[Patent Document 2]
Japanese Utility Model Publication No. Sho 62-32813 (page 2, FIG. 1, FIG. 5).
[0004]
[Problems to be solved by the invention]
In the above-described conventional technology, the driving source of the nozzle touch device is different from the electric motor and the hydraulic cylinder, but both of them have the nozzle touch device arranged side by side on a support or a support shaft that supports the injection device downward. In a device that uses a hydraulic cylinder whose piston moves linearly as a drive source, it is only necessary to connect the cylinder and the piston side by side to the column and connect the joint plate and the injection device, but to provide a pair of cylinders and pistons on the left and right, There is a problem that these must be operated simultaneously.
[0005]
In the case of using an electric motor as a drive source, a pair of left and right ball screw shafts provided over a movable platen and a lower plate of an injection device can be simultaneously operated by a single electric motor by a drive belt. Since a ball nut member and an electric motor that convert rotation into linear motion are required, it cannot be easily arranged between the joint plate and the injection device as in the case of a hydraulic cylinder, and the arrangement position is also a movable platen. And the lower plate of the injection device. In addition, it is necessary to form a relief hole for the ball screw shaft on the movable platen, and the installation is troublesome.
[0006]
Therefore, an object of the present invention is to simplify the nozzle touch device using an electric motor as a driving source by partially configuring the support shaft of the injection device as a ball screw shaft. It is an object of the present invention to provide a new electric nozzle touch device which can be used in a vertical molding machine or a horizontal molding machine by being erected or connected to an electric mold clamping device.
[0007]
[Means for Solving the Problems]
The present invention according to the above object provides an injection device in which an injection drive unit having an electric motor as a drive source is provided between a pair of front and rear plates, and a heating cylinder having a screw interior connected to the center of the front surface of the front plate. The front and rear plates are provided so as to be able to advance and retreat freely, and the portion where the rear plate of the support shaft moves is formed as a ball screw shaft longer than the nozzle touch stroke, while the screw shaft insertion portion of the rear plate has a gear or pulley etc. An electric motor for nozzle touch that rotatably attaches a ball nut member to which the rotating member is connected, is screwed with a ball screw shaft, and rotates the ball nut member to advance and retreat the injection device, is provided on the side of the rear plate. It is to be provided in.
[0008]
Further, the present invention provides a clamping ball screw shaft of an electric clamping device in which the support shaft is provided vertically on the left and right sides of a support on the machine base with the end opposite to the ball screw shaft as a base end. An electric nozzle touch device is vertically provided above the machine base together with the above-mentioned injection device.
[0009]
In addition, the present invention provides the support shaft, wherein the support shaft is erected on an upper surface of a movable plate provided so as to be able to move up and down on an upper portion of the machine base, with the end portion opposite to the ball screw shaft as a base end portion. The device is provided vertically on a movable platen.
[0010]
Further, according to the present invention, the support shaft is connected to the rear end of a mold-clamped ball screw shaft of an electric mold-clamping device provided horizontally on the machine base, with the end opposite to the ball screw shaft as a base end. The end portions of both ball screw shafts are supported by a fixing plate on the machine base, and an electric nozzle touch device is provided laterally on the machine base together with the injection device.
[0011]
Further, the electric mold clamping device includes a pair of left and right housings, a mold clamping ball nut member provided with a pulley provided rotatably vertically in each housing, and a threaded engagement with the mold clamping ball nut member. The mold clamping ball nut member is rotated through a pair of left and right mold clamping ball screw shafts that are inserted and one end is connected to the movable plate, and the mold clamping drive belt wound around both pulleys, and the mold clamping ball screw shaft is moved forward and backward. And a clamping electric motor.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 show a nozzle touch device of an electric vertical molding machine. In the drawings, reference numeral 1 denotes an injection device, 2 denotes a pair of right and left support shafts which support the injection device 1 so as to be able to advance and retreat, and 3 denotes a machine base. An electric mold clamping device vertically provided on the left and right sides of a support 5 standing upright on a base 4 having a mold clamping ball screw shaft 7 having a lower end connected to a movable platen 6 at the upper part of the machine base; At both upper ends of the shaft 7, the support shaft 2 is erected long upward.
[0013]
The injection device 1 includes an injection drive unit provided between a pair of front and rear plates 9 and 10, and a heating cylinder 11 inside an injection screw having a base end connected to the center of the front surface of the front plate 9. Both ends of 9 and 10 are inserted through both support shafts 2, and are provided vertically above the machine base with the nozzle side facing downward.
[0014]
The injection drive section includes a pair of guide rods 12 opposed to the upper surface of the front plate 9, which are inserted through the guide rods 12 such that the end portions of the injection screws 13 are rotatably connected to the lower surface. Holding member 15 fixedly connected to the front plate 9 at the upper end of the holding member 15, an injection ball screw shaft 16 having a shaft portion rotatably supported at the center of the holding member 15, and screwed with the injection ball screw shaft 16 A ball nut member 17 on the injection plate, a guide member 18 fixed to both sides of the holding member 15 and having both ends inserted through the support shaft 2, and a pair of connecting rods 19 attached to the rear plate 10; The holding member 15 and the rear plate 10 are integrated with the front plate 9 by the connecting rod 19 and the guide rod 12, so that the support shaft 2 is moved together. .
[0015]
Pulleys 20 and 21 are attached to a screw shaft end protruding from the holding member 15 and an end of the injection screw 13, and an electric servomotor attached to the side of the holding member 15 and the side of the front plate 9. The rotation of the electric motor 22 for injection and the electric motor 23 for measurement by means of, for example, can be transmitted to the injection ball screw shaft 15 and the injection screw 13 via the drive belt 22a (the measurement side is not shown). (See FIGS. 2 and 3).
[0016]
The portion where the rear plate 10 of the support shaft 2 moves is formed on a ball screw shaft 24 longer than the nozzle touch stroke S, and a ball nut member 25 having a normal structure is attached to the ball screw shaft 24. It is rotatably attached to the insertion part and screwed. A rotating member 26 such as a gear or a pulley is integrally connected to an upper portion of the ball nut member 25.
[0017]
By this rotating member 26, the rotation of the electric motor 27 for nozzle touch attached to the side of the rear plate is transmitted to the ball nut member 25 via a transmission member 27a such as a chain or a drive belt. The ball screw shaft 24 in a fixed state, which forms a part of the support shaft 2, is rotated to move the injection device 1 up and down. The electric motor 27 may be an electric servo motor or a gear motor with a brake.
[0018]
The electric clamping device 3 includes a disk-shaped housing 31, a clamping ball nut member 33 with a pulley 32 rotatably provided vertically in each housing, and screwed with the clamping ball nut member 33. A mold that rotates the mold clamping ball nut member 33 via the mold clamping ball screw shaft 7 inserted through the housing 31 and the mold clamping drive belt 34 a wound around the pulley 32 to move the mold clamping ball screw shaft 7 forward and backward. And a fastening electric motor 34.
[0019]
Such an electric mold clamping device 3 is provided on the left and right of the upper part of the machine base by vertically attaching the housing 31 to the arms 52 projecting from the left and right of the front plate 51 of the support 5, respectively. The motor 34 is mounted upward on the back surface of the front plate 51, and is clamped by a clamping drive belt 34a wound around the pulley 32 of the clamping electric motor 34 and the pulley 32 of both clamping ball nut members 33. The rotation of the electric motor 34 is transmitted to both mold clamping ball nut members 33, and the rotation of the mold clamping ball nut members 33 is converted into linear motions of the mold clamping ball screw shafts 7. The movable die 6 moves up and down together with the movable platen 6 connected to the movable platen 6, whereby the fixed mold 4 a on the upper surface of the machine base and the movable die 6 a on the lower surface of the movable plate 6 having the insertion hole 8 formed in the center can be opened, closed and closed. like And Aru. The movable platen 6 is fitted and held on a linear guide rail 53 provided vertically on the front plate 51 so as to move vertically.
[0020]
In the above configuration, the injection device 1 is supported on the support shaft 2 integrated with the mold-clamping ball screw shaft 7 with the nozzle facing downward by screwing the ball screw shaft 24 and the ball nut member 25 that constitute the nozzle touch device. Therefore, the injection device 1, the movable platen 6, and the nozzle touch device all move up and down together with the mold clamping ball screw shaft 7.
[0021]
Further, the nozzle touch device moves the ball screw shaft 24 up and down independently of the up and down movement by the mold clamping ball screw shaft 7 by the rotation of the ball nut member 25 by the electric motor 27. As a result, the nozzle touch stroke S of the injection device 1 can be moved, so that the movable mold 6a is lowered together with the support shaft 2 by the mold clamping ball screw shaft 7 to close the mold. Can be operated to continuously perform the nozzle touch of the injection device 1. In some cases, the operation of the electric mold clamping device 3 and the operation of the nozzle touch device can be performed in parallel.
[0022]
FIG. 5 shows that the support shaft 2 is erected on the upper surface of a movable plate 61 which can be lifted and lowered above the machine base 4 with the end opposite to the ball screw shaft 24 as a base end. This shows another embodiment vertically provided on the movable platen 61 together with 1, and the same parts as those in the above embodiment are denoted by the same reference numerals and description thereof will be omitted.
[0023]
The movable platen 61 of this embodiment is connected to a towing rod 62 of a toggle-type mold clamping device (not shown) having four corners built in the machine base 4 and supported by the upper portion of the machine base so as to be able to move up and down. By the vertical movement, the movable die 61a on the lower surface of the movable platen and the fixed die 63a on the upper surface of the die placing plate 63 placed on the machine base are opened / closed and closed. Also in such a mold clamping device, the nozzle touch device can be operated in parallel with the mold opening or after the mold closing to perform the nozzle touch of the injection device 1 in the same manner as in the above embodiment.
[0024]
The embodiment shown in FIG. 6 is a case where the vertical molding machine shown in FIGS. 1 to 4 is configured as a horizontal molding machine as it is, and the support shaft 2 has an end opposite to the ball screw shaft 24. As a base end, a rear end of the mold clamping ball screw shaft 7 of the electric mold clamping device 3 provided laterally on the left and right on the machine base 64 is connected to the rear end of the ball screw shafts 24. This illustrates a case where the nozzle touch device is supported and fixed by the upper fixing plate 65 and the nozzle touch device is provided alongside the injection device 1 on a machine base. Therefore, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0025]
In this embodiment, the movable platen 6 is movably installed on a linear guide rail 64 laterally provided on the machine base, and the movable platen 6 is connected to the front end of a mold-clamping ball screw shaft 7. The movable mold 6a and the fixed mold 67a of the fixed board 65 on the machine stand erected at the position opposing the movable board 6 can open and close and mold the mold by the electric mold clamping device 3. Also in the horizontal molding machine, the nozzle touch device can be operated in parallel with the opening of the mold or after the mold is closed to perform the nozzle touch of the injection device 1 in the same manner as in the above embodiment.
[0026]
As described above, since the nozzle touch device of the present invention uses a part of the support shaft as the ball screw shaft of the nozzle touch device, it is not necessary to arrange members for moving the injection device forward and backward on both sides of the support shaft, In addition, it is only necessary to mount the ball nut member to be screwed with the ball screw shaft on the rear plate of the injection device, and to dispose the electric motor on the side of the ball nut member. By moving the ball nut side, the ball nut member is mounted on the movable platen In such a case, it is not necessary to drill an escape hole, which is indispensable, and the structure is simplified. Depending on the installation direction of the support shaft, the support shaft can be installed vertically or horizontally together with the injection device. Machine can also be adopted.
[Brief description of the drawings]
FIG. 1 is a front view of a vertical molding machine equipped with an electric nozzle touch device of the present invention before a nozzle touch (A) and after a nozzle touch (B).
FIG. 2 is a side view of the support before the nozzle is touched.
FIG. 3 is a plan view of the injection device.
FIG. 4 is a sectional view taken along line AA of FIG. 2;
FIG. 5 is a front view of another embodiment provided with the electric nozzle touch device of the present invention before the nozzle touch.
FIG. 6 is a front view of a horizontal molding machine provided with the electric nozzle touch device of the present invention, in which a machine base before nozzle touch is longitudinally cut.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 injection device 2 support shaft 3 electric mold clamping device 4 machine base 5 support 6 movable plate 7 mold clamping ball screw shaft 9 front plate 10 rear plate 12 guide rod 14 injection plate 15 holding member 16 injection ball screw shaft 17 injection ball nut Member 18 Guide member 19 Connecting rod 22 Mold clamping electric motor 24 Ball screw shaft for nozzle touch 25 Ball nut member for nozzle touch 26 Rotating member 27 Electric motor 27a for nozzle touch Drive belt 31 Housing 32 Pulley 33 Mold clamping ball nut Member 34 Mold clamping electric motor 61 Movable boards 65, 67 Fixed board

Claims (5)

An injection drive unit with an electric motor as a drive source is provided between a pair of front and rear plates, and an injection device that connects a heating cylinder inside the screw to the center of the front of the front plate, allowing the front and rear plates to move freely to a pair of left and right support shafts. A ball in which a portion where the rear plate of the support shaft moves is formed as a ball screw shaft longer than the nozzle touch stroke, and a rotating member such as a gear or a pulley is connected to the screw shaft insertion portion of the rear plate. An electric motor for nozzle touch, which rotatably mounts a nut member and is screwed with a ball screw shaft and rotates the ball nut member to advance and retreat the injection device, is provided on a side portion of the rear plate. Electric nozzle touch device. The support shaft is erected on the upper end of a mold clamping ball screw shaft of an electric mold clamping device provided vertically on the left and right sides of a support on the machine base with the end opposite to the ball screw shaft as a base end. 2. The electric nozzle touch device according to claim 1, wherein the electric nozzle touch device is provided vertically above the machine base together with the injection device. The support shaft is erected on the upper surface of a movable plate provided so as to be able to move up and down on the machine base, with the end opposite to the ball screw shaft as a base end, and provided vertically on the movable plate with the injection device. The electric nozzle touch device according to claim 1, wherein: The above-mentioned support shaft is connected to the rear end of a clamped ball screw shaft of an electric clamping device provided laterally on the machine base, with the end opposite to the ball screw shaft as a base end. 2. The electric nozzle touch device according to claim 1, wherein an end of the screw shaft is supported by a fixing plate on the machine base, and is provided laterally on the machine base together with the injection device. The electric mold clamping device includes a pair of left and right housings, a mold clamping ball nut member provided with a pulley vertically rotatably provided in each housing, and a threaded engagement with the mold clamping ball nut member to penetrate each housing. The mold clamping ball nut member is rotated through a pair of left and right mold clamping ball screw shafts, one end of which is connected to a movable platen, and a mold clamping drive belt wound around both pulleys, and the mold clamping ball screw shaft is moved forward and backward. 5. The electric nozzle touch device according to claim 2, comprising a mold clamping electric motor.

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