JP5607775B2 - Illumination device for nozzle touch confirmation of injection molding machine - Google Patents

Description

  The present invention relates to an injection molding machine, and more particularly to an illumination device for confirming nozzle touch in an injection part of an injection molding machine.

In an injection molding machine, a stationary platen, a movable platen, and a rear platen disposed behind the movable platen are coupled by a plurality of tie bars, and the movable platen and the rear platen move along the tie bars. In addition, molds are respectively attached to the processing surfaces of the fixed platen and the movable platen that face each other, and perform mold clamping and mold opening operations.
Also, the injection unit is moved back and forth with respect to the fixed platen, the injection nozzle at the tip of the cylinder of the injection unit is brought into close contact with the resin injection port of the fixed platen, the resin melted by the screw rotation is provided in front of the cylinder, and the screw is advanced By moving, the molten resin is injected into the mold.

FIG. 1 is a diagram showing an overall configuration of an injection molding machine M including an injection unit, in which an injection nozzle 12 at the tip of an injection cylinder part 10 of an injection part Mi is brought into close contact with a resin injection port of a fixed platen 33. Indicates the state.
The injection molding machine M includes a mold clamping part Mc and an injection part Mi on a base (not shown). The injection part Mi heats and melts a resin material (pellet), and injects the molten resin into the cavity of the mold 40. The mold clamping portion Mc mainly opens and closes the mold 40 (40a, 40b).

  First, the injection part Mi will be described. An injection nozzle 12 is attached to the tip of the injection cylinder unit 10, and a screw 13 is inserted into the injection cylinder unit 10. The screw 13 is rotated by the servo motor M2, and is moved in the axial direction of the screw 13 by the servo motor M1. Reference numeral 14 denotes a hopper that supplies resin to the injection cylinder unit 10.

  Next, the mold clamping part Mc will be described. The mold clamping portion Mc includes a rear platen 31, a movable platen 30, a toggle 32, a fixed platen 33 fixed on the base 2, a cross head 34, and an ejector mechanism 35. The rear platen 31 and the fixed platen 33 are connected by a plurality of tie bars 41, and the movable platen 30 is arranged to be guided by the toggle 32. A movable mold 40 a is attached to the movable platen 30, and a fixed mold 40 b is attached to the fixed platen 33. When the cross head 34 is moved forward (moved in the right direction in FIG. 1), the movable platen 30 is moved forward to perform mold closing.

  A molding operation using the injection molding machine will be described. When the movable platen forward / reverse motor is rotated in the forward direction, the ball screw shaft 38 is rotated in the forward direction, and the crosshead 34 screwed to the ball screw shaft 38 is moved forward (rightward in FIG. 1), thereby moving the movable platen. 30 is advanced.

  When the movable mold 40a attached to the movable platen 30 comes into contact with the fixed mold 40b (mold closed state), the rear platen position is corrected and then the mold clamping process is performed. In the mold clamping process, a mold clamping force is generated in the mold 40 by further driving the movable platen forward / reverse motor in the forward direction. Then, the servo motor M1 of the injection device back-and-forth mechanism provided in the injection part Mi is driven to advance in the axial direction of the screw 13, thereby filling the cavity space formed in the mold 40 with the molten resin. . When the mold is opened, the ball screw shaft 38 is rotated in the reverse direction by driving the movable platen forward / reverse motor in the reverse direction. Along with this, the cross head 34 moves backward, the toggle mechanism operates in a bending direction, and the movable platen 30 moves backward in the direction of the rear platen 31. When the mold opening process is completed, an ejector pin (not shown) is protruded from the inner surface of the movable mold 40a, and a molded product in the movable mold 40a is protruded from the movable mold 40a.

In these injection molding machines, when the mold 40 is exchanged, it is necessary to adjust so that the joint between the injection nozzle 12 and the mold 40 is joined in the correct positional relationship. In addition, it is necessary to confirm that there is no resin leakage at the joint between the injection nozzle 12 and the mold 40 even during molding.
However, since the vicinity of the joint between the mold 40 and the injection nozzle 12 is inside the mold fixing platen, it is often dark and difficult to see.

  As a means for solving the difficulty of visual observation, in an injection molding machine as shown in FIG. 9, bonding is performed using a simple illumination such as a flashlight from a gap between a fixed platen and an injection nozzle. A method of illuminating the part is used. Further, as shown in FIG. 10, Patent Document 1 discloses a technique for providing a light-carrying hole in a fixed platen for brightening a joint between a mold and an injection nozzle. Discloses a technique for image analysis of the state of the tip of an injection nozzle using a camera.

JP-A-5-329899 JP-A-6-328527

  The technique of illuminating the joint using a simple lighting device such as a flashlight is often performed by the worker himself / herself holding and operating the flashlight, and in this case, the burden on the worker increases. Also, if a simple lighting device such as a flashlight is left in the injection molding machine, the flashlight may be corroded by gas generated from the resin material, damaged by interference with other parts of the injection molding machine, There is a possibility of causing a fire due to the heat effect from the member.

The light hole made in the fixed platen disclosed in Patent Document 1 is required to be enlarged to make it brighter, but it is difficult to make it too large for reasons of strength. Moreover, since it is assumed that the injection molding machine is installed in various places, there is a problem that sufficient illuminance may not be obtained depending on the surrounding environment.
The technique disclosed in Patent Document 2 requires time and labor for installation of the camera, and the operation of the camera and the like must be performed separately from the operation of the injection molding machine by the operator. Become. Furthermore, since the camera is operated separately from the operation of the injection molding machine, there is a possibility that the camera operation is forgotten.

  Accordingly, an object of the present invention is to provide an injection molding machine capable of easily confirming that a joint portion between an injection nozzle and a mold is in a correct positional relationship and that there is no resin leakage or the like.

In the invention according to claim 1 of the present application, a fixed platen that is fixed on a base and for mounting a fixed-side mold, a movable platen for mounting a movable-side mold, and a fixed-side mold mounting of the fixed platen An injection molding apparatus comprising: an injection device arranged to face a surface opposite to the surface; and a nozzle touch mechanism for joining an injection nozzle provided at a tip of a barrel of the injection device to the fixed mold. In the machine, an illumination device for irradiating a joint portion between the fixed mold and the injection nozzle is provided on any of the fixed platen, the base, the injection nozzle, and a heat cover provided around the injection nozzle. There is provided an injection molding machine characterized in that at least one of lighting and extinguishing of the lighting device is performed according to an operation of the injection molding machine by an operator and an operation of the injection molding machine.

That is, in the invention according to claim 1, since the illumination device is provided in the injection molding machine and light is irradiated to the joint portion between the mold and the injection nozzle, it is not affected by the environment of the installation place of the injection molding machine. Sufficient illuminance can be obtained. In addition, in order to install the lighting device in a place where it is not affected by interference with other parts of the injection molding machine, gas generated from the resin material, or heat from the high temperature part, the lighting device may be corroded or damaged. Can prevent and prevent fire. Furthermore, the operator adjusts, holds, and operates the lighting device so that the lighting device is turned on and off in accordance with the operation of the injection molding machine and the operation of the injection molding machine, not by the operator. This is not necessary and the burden on the operator is reduced. Furthermore, as the installation location of the lighting device, it was installed on any of the fixed platen, base, injection nozzle, and heat cover, so that interference with other parts of the injection molding machine, gas generated from the resin material and high temperature The lighting device is installed in a place that is not affected by heat from a certain place.

In the invention according to claim 2 of the present application, the fixed platen is formed on the surface on the opposite side of the fixed mold mounting surface from the periphery of the joint between the fixed mold and the injection nozzle. The injection molding machine according to claim 1, wherein the injection molding machine has a concave shape toward a joint portion of the injection nozzle .

In the invention which concerns on Claim 3 of this application, when the said injection nozzle starts advance, the said illuminating device will be lighted, The injection molding machine of Claim 1 or 2 characterized by the above-mentioned is provided.
That is, in the invention according to claim 3, since the lighting device is turned on when the injection nozzle starts moving forward, it is not necessary for the operator to adjust, hold, and operate the lighting device, and the burden on the worker is reduced. .

In the invention according to claim 4 of the present application, the fixed platen is provided with a light taking hole penetrating from the surface on the injection device side in the vicinity of the joint portion between the fixed side mold and the injection nozzle, and the lighting device is provided with the light removal device. The injection molding machine according to any one of claims 1 to 3, wherein light is irradiated from a surface of the hole on the injection device side.
That is, in the invention according to claim 4, since the light-emitting hole is provided and light is emitted from the light-emitting hole by the illuminating device, the illuminating device in the vicinity of the joint portion between the fixed side mold and the injection nozzle is illuminated. It becomes possible to irradiate light more effectively to the place to be done.

  According to the present invention, it is possible to provide an injection molding machine capable of easily confirming that the joint between the injection nozzle and the mold is in a correct positional relationship and that there is no resin leakage or the like.

It is a figure which shows the whole structure of an injection molding machine. It is a figure which shows the fixing method of the illuminating device of 1st Embodiment. It is a figure which shows the fixing method of the illuminating device of 2nd Embodiment. It is a figure which shows the fixing method of the illuminating device of 3rd Embodiment. It is a figure which shows the fixing method of the illuminating device of 4th Embodiment. It is a figure which shows the example of arrangement | positioning of the illuminating device when there is no light hole of this invention. It is a figure which shows the example of arrangement | positioning of the illuminating device at the time of providing the lighting hole of this invention. It is a flowchart which shows the control method of turning on / off of the illuminating device in this invention. It is a figure which shows the conventional general example of the junction part of an injection nozzle and a metal mold | die. It is a figure which shows the prior art example provided with the lighting hole in the junction part of an injection nozzle and a metal mold | die.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The overall configuration of the injection molding machine M is the same as that shown in FIG.
In order to correctly perform the injection operation in the injection molding machine M, the injection nozzle 12 and the mold 40 need to be arranged in a correct positional relationship. In the present invention, the illumination device 21 is provided in the injection molding machine M in order to easily confirm that the joint between the injection nozzle 12 and the mold 40 is in the correct positional relationship and that there is no resin leakage. Moreover, this illuminating device 21 is installed in the place which is not influenced by the interference with the other site | part of an injection molding machine, the gas generated from a resin material, or the member which becomes high temperature.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
2A and 2B are views showing the first embodiment. FIG. 2A is a plan view of the fixed platen 33 and the cylinder 11 as viewed from above, and FIG. It is the front view seen from 11 side. The fixed platen 33 is provided with a light hole 61 through which light from the outside can be taken. The fixed platen 33 is provided with an illuminating member 23 as an illuminating device 21 via an attachment member 22, and the illuminating member 23 brightens the vicinity of the joint between the fixed platen 33 and the injection nozzle 12.

  3A and 3B are diagrams showing a second embodiment. FIG. 3A is a plan view of the fixed platen 33 and the cylinder 11 as viewed from above, and FIG. It is the front view seen from 11 side. In the present embodiment, the lighting device 21 includes a mounting member 22 on the base 2, and a lighting member 23 is provided at the other tip of the mounting member 22. As in the first embodiment, The illumination member 23 brightens the vicinity of the joint between the fixed platen 33 and the injection nozzle 12.

  4A and 4B are diagrams showing a third embodiment. FIG. 4A is a plan view of the fixed platen 33 and the cylinder 11 as viewed from above, and FIG. It is the front view seen from 11 side. In this embodiment, the injection nozzle 12 is provided with an illumination member 23 as an illumination device 21 via a mounting member 22, and the illumination member 23 brightens the vicinity of the joint between the fixed platen 33 and the injection nozzle 12. doing.

  5A and 5B are views showing a fourth embodiment. FIG. 5A is a plan view of the fixed platen 33 and the cylinder 11 as viewed from above, and FIG. It is the front view seen from 11 side. In the present embodiment, the heat cover 16 provided around the injection nozzle 12 is provided with an illumination member 23 via the attachment member 22 as the illumination device 21, and the illumination plate 23 and the fixed platen 33 are injected by the illumination member 23. The vicinity of the joint with the nozzle 12 is brightened.

  In these embodiments, the installation location of the illumination device 21 is arranged on the back side (right side in FIGS. 3 to 6) when viewed from the operator. When the lighting device 21 is arranged in this way, it becomes easier for the operator to see the vicinity of the joint portion between the injection nozzle 12 and the mold 40 from a place where the front lighting device 21 is not installed. However, the illumination device 21 does not necessarily have to be disposed on the back side as viewed from the operator, and can be disposed on the near side (left side in FIGS. 3 to 6).

  6 and 7 show examples of the case where the fixed platen 33 is provided with the light hole 61 and the case where the light hole 61 is not provided. FIG. 6 shows the case where the light hole 61 is not provided, and FIG. Shows the case. As shown in FIG. 6, when there is no light hole 61, the illumination device 21 is disposed at a position where it is not obstructed by the screw 13 or the injection nozzle 12, and as shown in FIG. When there is the light hole 61, the illumination device 21 can be arranged on the surface side of the light hole 61 on the cylinder 11 side to irradiate light. 6 and 7, the example in which the illumination device 21 is provided on the fixed platen 33 has been described. However, when the illumination device 21 is provided on other members constituting the injection molding machine M, the illumination device is provided. It is possible to change the installation location of 21 suitably.

Next, a method for controlling turning on and off of the lighting device 21 according to the present invention will be described with reference to the flowchart of FIG.
(Step SA1) It is determined whether or not the advance of the injection nozzle 12 has started. If advance of the injection nozzle 12 is started (YES), the process proceeds to step SA2, and otherwise (NO) is ended.
(Step SA2) The lighting device 21 is turned on.
(Step SA3) It is determined whether or not the timer 1 has completed timing. If the timing has not been completed (NO), step SA3 is repeated, and if the timing has been completed (YES), the process proceeds to step SA4. The timer 1 defines a minimum lighting time after the injection nozzle 12 starts to advance.

(Step SA4) It is determined whether or not the injection nozzle 12 has reached the forward end. If it has reached (YES), the process proceeds to step SA5, and if it has not reached (NO), the process returns to step SA1.
(Step SA5) It is determined whether or not the time measurement of the timer 2 is completed. If the time measurement is not completed (NO), Step SA5 is repeated, and if the time measurement is completed (YES), the process proceeds to Step SA6. The timer 2 defines a time for checking after the forward end of the injection nozzle 12 is completed.
(Step SA6) The lighting device 21 is turned off and the process ends.

  In these embodiments, the example in which the lighting device 21 is provided on the fixed platen 33, the base 2, the injection nozzle 12, and the heat cover 16 provided around the injection nozzle 12 has been described. The installation location of the apparatus 21 is not limited to these locations, and may be installed in other locations of the injection molding machine as long as the joint between the injection nozzle 12 and the mold 40 can be appropriately illuminated. You can also.

Further, in the present embodiment, it is detected that the injection nozzle 12 has started to advance, the lighting device 21 is turned on, and after the injection nozzle 12 reaches the forward end, the timer 2 is turned off after the time measurement is completed. However, for example, it can be turned on in conjunction with a switch for advancing the injection nozzle, or it can be turned on automatically and turned off manually.
Further, the illumination device 21 is turned on in conjunction with the injection nozzle forward manual switch while the purge gate for preventing the resin from splashing from the injection nozzle 12 is closed. Can be automatically turned off when the purge gate is closed again.

M injection molding machine Mi injection part Mc mold clamping part M1, M2, M3, M4 servo motor 2 base 11 cylinder 12 injection nozzle 13 screw 14 hopper 16 heat cover 21 illumination device 22 mounting member 23 illumination member 30 movable platen 31 rear platen 32 Toggle 33 Fixed platen 34 Cross head 38 Ball screw shaft 40 Mold 40a Movable side mold 40b Fixed side mold 41 Tie bar 61 Light hole

Claims (4)

A fixed platen fixed on the base and for mounting a fixed mold;
A movable platen for mounting the movable mold,
An injection device disposed opposite to a surface opposite to the fixed mold mounting surface of the fixed platen, and an injection nozzle provided at a tip of a barrel of the injection device for joining the fixed mold A nozzle touch mechanism;
In an injection molding machine comprising:
An illumination device for irradiating a joint between the fixed mold and the injection nozzle is provided on any of the fixed platen, the base, the injection nozzle, and a heat cover provided around the injection nozzle .
According to the operation of the injection molding machine by an operator or the operation of the injection molding machine, at least one of turning on or off the lighting device is performed.
An injection molding machine characterized by that. The fixed platen is located on the surface opposite to the fixed mold mounting surface from the periphery of the fixed mold and the injection nozzle to the bonded section of the fixed mold and the injection nozzle. The injection molding machine according to claim 1, wherein the injection molding machine has a concave shape . When the injection nozzle starts moving forward, the lighting device is turned on.
The injection molding machine according to claim 1 or 2, characterized in that. The fixed platen is provided with a light hole that penetrates from the injection device side surface to the vicinity of the joint between the fixed mold and the injection nozzle,
The lighting device irradiates light from the surface of the light emitting hole on the injection device side,
The injection molding machine according to any one of claims 1 to 3.

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