JPH02141208A - Takeoff apparatus for molding article - Google Patents

Abstract

PURPOSE:To enable a takeoff head to be shifted promptly in a small structure, and the durability and reliability of an apparatus to be improved by constituting it in such a manner that a slider is shifted by a transmission mechanism having a gear and rack in use of the shifting force of a movable frame, and the takeoff head is advanced into a takeoff space by shifting a slider. CONSTITUTION:After a molding article is manufactured, a movable mold 89 is opened, and then shifted, in a X direction, and the rotating shaft 61A of a cam lever 61 is shifted, furthermore, a movable frame 20 is shifted in a X direction, and the shaft 63A of an engaged part 63 is shifted at the speed lower than that of the rotating shaft 61A, and a rack 41 is meshed with a gear 50, and then a slider 30 start to shift in a Y direction. The slider 30 advances into a takeoff space S for disengaging the engagement between a gear 60 and the rack 41. On the other hand, the shaft 63A of the engaged part 63 is advanced at the speed higher than the rotating shaft 61A of the cam lever 61 for shifting a takeoff head 70 in the direction relatively approaching to the movable mold 89, and thus the takeoff head 70 is brought in a close contact with the takeoff port of the movable mold 89. In this condition, a molding article is taken of from the movable mold 89.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molded product take-out device for taking out a molded product held in a movable mold of a resin molding machine.

[Technology background]

FIG. 7 shows a typical example of an injection molding machine for manufacturing resin molded products, where 80 is a resin molding machine main body, 81 is an injection unit, and 82 is a mold clamping unit.

The injection unit 81 is provided with a hopper 83, a kneading screw 84, and an injection nozzle 85.

The mold clamping unit 82 also includes a fixed mold 87 provided on a fixed platen 86 and a movable mold 89 provided on a movable platen 88 that is movable in a direction toward and away from the fixed platen 86. It is being

90 is a tie bar for guiding the movable platen 88, and 91 is an oil cylinder for moving the movable platen 88.

In an injection molding machine having such a configuration, with the movable mold 89 in close contact with the fixed mold 87, molten resin is injected from the injection nozzle 85 into the molding space formed by both molds, and is cooled and solidified to form a molded product. is manufactured.

Next, with the movable mold 89 opened and separated from the fixed mold 87, the take-out head of the molded product take-out device enters the take-out space between the two, and normally the movable mold 89
The molded product held adhered to is removed by the removal head.

However, conventional molded product ejecting devices are basically configured independently from the resin molding machine, and from the viewpoint of reliably preventing accidents such as the ejecting head colliding with the mold, The take-out head is controlled so that its operation is started after it is detected that the movable mold 89 has finished opening and it is confirmed that the take-out head is in a state where it can safely enter.

[Problem to be solved by the invention]

However, in conventional molded product take-out devices, the drive mechanism for moving the take-out head into the take-out space is complicated, making it impossible to miniaturize the device sufficiently. Since it takes a long time to reach the outlet of the molded product, there is a problem in that the molded product cannot be taken out quickly.

The present invention has been made based on the above-mentioned circumstances, and its object is to form a molding device that has a simple structure, can be sufficiently miniaturized, and can take out a molded product in a short time after the molding process is completed. The purpose of the present invention is to provide a product extraction device.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a molded product removal device connected to a resin molding machine, which links a fixed base frame to the movement of a movable mold of the resin molding machine after the molding process is completed. a movable frame slidably provided on the base frame; a slider provided on the movable frame so as to be slidable in a direction intersecting the movement direction; a conversion mechanism comprising a gear and a rack that starts the forward movement of the slider using the movement force of the frame;
The link mechanism of the movable frame includes a take-out head that follows the forward movement of the slider and enters a take-out space between a fixed mold of the resin molding machine and a movable mold spaced apart from the fixed mold, and the link mechanism of the movable frame includes: A cam lever whose rotating shaft portion is pivotally supported to follow the movement of a movable mold of a resin molding machine, an engaging portion provided at one end of the cam lever, and an engaging portion of the cam lever provided on the movable frame. an engaged part that engages with the joint part and transmits a moving force in the same direction as the movable mold to the movable frame; a cam follower provided at the other end of the cam lever; and a cam follower fixed to the base frame. a regulating member that is provided, and contacts the cam follower to regulate the moving speed of the movable frame, and the regulating member controls the moving speed of the movable frame at the time when the gear and the rack in the conversion mechanism start meshing. A speed reduction regulating surface that suppresses the moving speed of the movable mold to be lower than the moving speed of the movable mold, and a speed increase that suppresses the moving speed of the movable frame immediately before the opening movement of the movable mold is made greater than the moving speed of the movable mold. According to the device of the present invention, when the movable mold of the resin molding machine moves in a direction away from the fixed mold after the molding process is completed, the link mechanism causes the movable frame to move away from the fixed mold. starts to move in the same direction, and when this movable frame reaches a predetermined position, the gears and gears of the conversion mechanism start to mesh, and the slider and take-out head move into the take-out space using the moving force of the movable frame. At the start of this engagement, the moving speed of the movable frame is suppressed by the link mechanism to be smaller than the moving speed of the movable mold, so the mechanical impact force at the start of this engagement is alleviated and the durability of the device is increased. It is possible to improve performance and reliability.

When the movable frame moves further and the gears of the conversion mechanism and the rack disengage, the slider stops moving, the take-out head enters the take-out space, and the movable mold stops opening. Immediately before the removal, the moving speed of the movable frame becomes higher than the moving speed of the movable mold due to the link mechanism, so that the take-out head can quickly approach the take-out port of the movable mold without colliding with the movable mold. can.

[Specific content of the invention]

Hereinafter, the present invention will be specifically described based on examples with reference to the drawings.

1 to 3 are schematic diagrams showing an embodiment of a molded product take-out device according to the present invention, with some parts omitted to avoid complication.

10 is a base frame, which is directly or indirectly fixed to a resin molding machine (not shown).

A movable frame 20 is slidably provided on two guide rods 21 fixed between the base frames 10 and 10, and is reciprocated in conjunction with a movable mold (not shown) of the resin molding machine by a link mechanism. It is connected to the movable mold so that it can be moved. That is, the movable frame 20 is not provided with a drive source such as a dedicated drive motor. Here, arrow X
The direction indicated by (hereinafter also referred to as "X direction") indicates the opening movement direction of the movable mold, and the direction opposite to the X direction (hereinafter also referred to as "reverse X direction") indicates the closing movement direction of the movable mold. show.

30 is a slider (see Figures 2 and 3);
Two rods extending in a direction substantially perpendicular to the moving direction of the movable frame 20 are slidably provided on the idle rod 31. Here, the direction indicated by arrow Y (hereinafter referred to as "Y direction")
Also called. ) is the forward movement direction of the slider 30, which is the direction in which it enters the take-out space (not shown) of the resin molding machine. The direction opposite to the Y direction (hereinafter also referred to as "reverse Y direction") is the direction of retreat from the takeout space.

A rack member 40 is fixed between the base μ frames 10 and 10, and a rack 41 is provided in a part thereof. The length of this rack 41 is such that the gear 50 can be rotated approximately 90 degrees from the start of meshing with the gear 50 until it is released.
It is set to rotate. That is, by setting the rack 41 to a predetermined length in this manner, the entry distance of the take-out head 70 is made constant.

A gear 50 is pivotally supported by the movable frame 20 and moves in the X direction and the reverse X direction following the movable frame 20. A stopper portion 51 having a notch 52 is provided on the top of the gear 50, and rotation of the stopper portion 51 is prohibited by the stopper surface 42 provided on the top of the rack member 40. The rotation of the gear 50 is stopped before the engagement between the gear 50 and the rack 41 starts and after the engagement is released. 43 is
When the gear 50 and the rack 41 mesh, the stopper part 5
This is a notch for releasing the engagement between the stopper surface 42 and the stopper surface 42 .

The rotational movement of the gear 50 is performed by a rotary lever 33 that is eccentrically fixed to the axis of the gear 50, and a rotary lever 33 that is eccentrically fixed to the axis of the gear 50.
an engaging portion 34 provided at the end of the slider 30 and extending along the moving direction of the movable frame 20 provided on the slider 30;
The movement is converted into a movement in a direction intersecting the moving direction of the movable frame 20 by a conversion means having an engaging part 34 and an engaged part 35 that slidably engages with each other. In the illustrated example, the engaging portion 34 is constituted by a rotatably supported roller,
The engaged portion 35 is constituted by a long groove. Note that the specific configurations of the engaging portion and the engaged portion are not particularly limited.

When the rotary lever 33 rotates following the rotation of the gear 50, the engaging portion 34 at its end rotates in an arc around the axis of the gear 50, and the engaging portion 34 rotates when the slider 30 is engaged. The slider 30 is moved to the movable frame 20 by sliding in the direction in which the engaged portion 35 extends while pressing the portion 35 in the lateral direction.
Move in the Y direction that intersects with.

FIG. 4 shows the state after the movement.

The rotation angle of the rotary lever 33 is determined by the length of the rack 41, and in the illustrated example, it rotates approximately 90 degrees from the initial position shown in FIG. 1 to the final position shown in FIG. Become. Note that the angle of rotation is not particularly limited, and may be rotated by 180 degrees, for example.

Therefore, the engaging portion 34 provided at the end of the rotating lever 33
The movement locus follows a so-called cosine curve in which the movement of the movable frame 20 itself in the X direction and the rotational movement are combined. Therefore, the moving speed of the slider 30 at the time of starting and stopping the movement is relaxed, and the mechanical impact force caused by the movement of the slider 30 can be suppressed to a small level.

Reference numeral 70 denotes a take-out head (see FIG. 3), which is fixed to the slider 30 and moves following the movement of the slider 30.

The link mechanism of the movable frame 20 is connected to its rotating shaft portion 61A.
A cam lever 61 is pivoted directly or indirectly on the movable mold of the resin molding machine so that it follows the movement of the movable mold of the resin molding machine.
Then, the engaging portion 62 provided at one end of the cam lever 61 engages with the engaging portion 62 of the cam lever 61 provided on the movable frame 20 to apply a moving force to the movable frame 20 in the same direction as the movable mold. The engaged portion 63 that transmits the transmission, the cam follower 64 provided at the other end of the cam lever 61, and the base frame 10.
．． A regulating member 6 fixedly provided between the movable frame 20 and the regulating member 6 that contacts the cam follower 64 and regulates the moving speed of the movable frame 20.
5.

The cam lever 61 in this example has an L-shape and is pivotally supported at its bent portion. The engaging portion 62 consists of a notch, and the engaged portion 63 consists of a fixed shaft.

The engaging portion 62 is slightly iM in the lateral direction with respect to the engaged portion 63, that is, in the direction crossing the moving direction of the movable frame 20.
JJJ is now possible.

The cam follower 64 is constituted by a roller pivotally supported at the other end of the cam lever 61.

The regulating member 65 is fixed between the base frames 10 and 10, and is a speed reduction regulating surface that suppresses the moving speed of the movable frame 20 at the time when the gear 50 and the rack 41 in the conversion mechanism start to mesh to be smaller than the moving speed of the movable mold. and a speed increase regulating surface that makes the moving speed of the movable frame 20 higher than the moving speed of the movable mold immediately before the opening movement of the movable mold stops.

Specifically, as shown in FIG. 5, the regulating surface 66 of the regulating member 65 that comes into contact with the cam follower 64 includes an initial low-level flat surface 66A, and a slope 66B rising upward from this in the figure. It is composed of a high-level flat surface 66C that follows this and a slope 66D that falls from this, the rising slope 66B corresponding to a speed reduction restriction surface, and the falling slope 66D corresponding to a speed increase restriction surface.

FIG. 6 is a schematic diagram showing the movement locus of each part of the link mechanism, where the ○ marks lined up along the straight line mK indicate the locus of the rotating shaft portion 61A of the cam lever 61, and the ○ marks lined up along the broken line indicate the cam The trajectory of the contact portion of the follower 64 is shown, and O marks lined up along the straight line M indicate the trajectory of the shaft portion 63A of the engaged portion 63 that engages with the engaging portion 62.

That is, when the rotating shaft portion 61A of the cam lever 61 moves straight from the left end to the right, the cam follower 64 first moves in the X direction along the low-level flat surface 66A.
The shaft portion 63A of the engaged portion 63 moves at the same speed as the movable mold (hereinafter also referred to as "standard speed") (area A). In this region, the gear 50 and the rack 41 are not yet engaged.

Next, when the cam follower 64 moves along the rising slope 66B, a clockwise moment acts on the cam lever 61, so that the shaft portion 63A of the engaged portion 63 moves at a speed lower than the standard speed ( Area B). In this region, the gear 50 and the rack 41 begin to mesh. Therefore, the mechanical impact force when the gear 50 and the rack 41 mesh is suppressed to a small level.

Then, the cam follower 64 has a high level flat surface 66C.
When it reaches , it moves at the standard speed again (area C). In this region C, the gear 50 and the rack 41 are rotated uniformly in a meshed state, and then the mesh is released.

Further, when the cam follower 64 moves downward along the falling slope 66D, a counterclockwise moment acts on the cam lever 61, so that the shaft portion 63A of the engaged portion 63 moves forward at a speed higher than the standard speed. (area D). Therefore, in this area, the take-out head 7
0 moves forward relative to the movable frame 20 and comes close to and in close contact with the outlet of the movable mold.

According to the apparatus of the above embodiment, a molded product can be taken out in the following manner.

As shown in FIG. 8(a), in a resin molding machine, molten resin is injected into the molding space formed by both molds with the movable mold 89 in close contact with the fixed mold 87, and then it is cooled and solidified. After manufacturing the molded product, as shown in Figure 8 et al.
When the movable mold 89 is opened and moved in the X direction, the rotating shaft portion 61A of the cam lever 61 starts to move following the movable mold 89, thereby causing the movable frame 20 to move in the X direction.

When the rotating shaft portion 61A of the cam lever 61 moves and the cam follower 64 starts upward movement along the rising slope 66B, the shaft portion 63A of the engaged portion 63 moves toward the rotating shaft portion 61.
The rack 41 moves at a speed smaller than A, and at this small speed, the rack 41 starts to mesh with the gear 50, and the slider 30 starts moving in the Y direction as shown in FIG. 8(C).

When the slider 30 enters the take-out space S, the gear 60 and the rack 41 are disengaged, and as shown in FIG.
As shown in d), the forward movement of the slider 30 is stopped. On the other hand, the cam follower 64 has a falling slope 66D.
As a result, the shaft portion 6 of the engaged portion 63
3A advances at a higher speed than the rotating shaft portion 61A of the cam lever 61, and the take-out head 70 moves in a direction relatively approaching the movable mold 89, catching up with the movable mold 89, so to speak.
As shown in FIG.
Closely attaches to outlet 9.

In this state, the molded product is taken out from the movable mold 89 to the takeout head 70. This molded product is stored in a predetermined location via a pipe or the like provided in the take-out head 70.

When the molded product has been taken out in this way, the cam lever 61 follows the movement of the movable mold 89 in the closing direction.
The rotating shaft portion 61A moves, and the movable frame 20 and slider 30 return to their original positions by an operation opposite to the above.

After returning to the original position in this manner, the next molded product is produced and removed through the same process as above.

According to the molded product take-out device having the above configuration, the movable frame 20 is linked to the movable mold by the link mechanism, and the moving force of the movable frame 20 is transferred to the take-out space of the slider 30 by the conversion mechanism having the gear 50 and the rack 41. Since the force is converted into a moving force toward S, the take-out head 70 can be quickly entered into the take-out space S without requiring a separate drive source and with a simple structure and sufficient miniaturization of the device. .

Moreover, the link mechanism has a specific structure, and the gear 5
Since the moving speed of the movable frame 20 is made smaller than the moving speed of the movable mold when the gear 50 and the rack 41 start meshing, the mechanical impact force when the gear 50 and the rack 41 start meshing can be alleviated. It is possible to improve the durability and reliability of the device. In addition, since the moving speed of the movable frame 20 immediately before the movable mold stops opening is set higher than the moving speed of the movable mold, the take-out head 70 can be safely removed without colliding with the movable mold. It can be brought into close contact with the outlet of the movable mold.

Although the present invention has been described above based on Examples, the present invention is not limited to the above-mentioned Examples, and various embodiments are possible.

〔Effect of the invention〕

As explained above in detail, according to the device of the present invention, the movable frame is moved to follow the movable mold by a specific link mechanism, and the moving force of the movable frame is The slider is moved in a direction that intersects the moving direction of the movable frame, and the take-out head is moved into the take-out space using The head can be quickly moved to a predetermined position.

Furthermore, a specific link mechanism suppresses the moving speed of the movable frame at the start of meshing between the gears and the rack to be lower than the moving speed of the movable mold, so it is possible to reduce the mechanical impact force when the gears and the rack mesh. It is possible to improve the durability and reliability of the device. In addition, the moving speed of the movable frame immediately before the opening movement of the movable mold stops is made greater than the moving speed of the movable mold, so the take-out head can safely open the movable mold without colliding with the movable mold. It can be placed in close contact with the outlet.

[Brief explanation of the drawing]

Figures 1 to 3 are an explanatory front view, a partially cutaway front view, and a vertical side view showing one embodiment of the molded product take-out device according to the present invention, and Figure 4 is when the take-out head enters the take-out space. Fig. 5 is an explanatory diagram showing the outline of the link mechanism, Fig. 6 is an explanatory diagram showing the locus of each part in the link mechanism, and Fig. 7 is an example of a resin molding machine. An explanatory diagram showing the outline of FIG. 8(a)
-(e) are explanatory diagrams sequentially showing the movement of the take-out head in a simplified manner. 10...Foundation frame 21...Guide rod 31...Guide rod 34...Engaging part 40...Rack member 42...Stopper surface 50...Gear 52...Notch part 61A. ...Rotating shaft part 63...Engaged part 64...Cam follower 20...Movable frame 30...Slider 33...Rotating lever 35...Engaged part 41...Rack 43 ... Notch part 51 ... Stopper part 61 ... Cam lever 62 ... Engagement part 63A ... Shaft part 65 of the engaged part ... Regulation member 66 ... Regulation surface 66D ... Upright Descending slope 80...(sealing molding body 83...hopper 85...injection nozzle 87...fixed mold 89...movable mold 91...oil cylinder 66B...rising slope 70... Take-out head 81... Injection unit 84... Kneading screw 86... Fixed platen 88... Movable platen 90... Tie bar + 4 figures

Claims (1)

[Claims] (1) A molded product take-out device connected to a resin molding machine, which has a fixed base frame and is slidable on the base frame by linking with the movement of a movable mold of the resin molding machine after the molding process is completed. a movable frame provided therein; a slider provided on the movable frame so as to be slidable in a direction intersecting the direction of movement of the movable frame; A conversion mechanism comprising a gear and a rack that starts the forward movement of the slider, and a conversion mechanism that follows the forward movement of the slider to eject between a fixed mold of a resin molding machine and a movable mold spaced apart from the fixed mold of the resin molding machine. a take-out head that enters the space, and the link mechanism of the movable frame includes a cam lever whose rotating shaft portion is pivotally supported to follow the movement of the movable mold of the resin molding machine, and one end portion of the cam lever. an engaging portion provided on the movable frame, and an engaged portion provided on the movable frame that engages with the engaging portion of the cam lever and transmits a moving force to the movable frame in the same direction as the movable mold; a cam follower provided at the other end of the cam lever; and a regulating member fixedly provided to the base frame and abutting the cam follower to regulate the moving speed of the movable frame, the regulating member , a speed reduction regulating surface that suppresses the moving speed of the movable frame to be lower than the moving speed of the movable mold when the gears and racks in the conversion mechanism start meshing;
A molded product take-out device characterized by having a speed increase regulating surface that makes the moving speed of the movable frame larger than the moving speed of the movable mold immediately before the opening movement of the movable mold stops.