JPS6294319A - Apparatus for automatic unloading of product in injection molding machine - Google Patents

Abstract

PURPOSE:To contrive the improvement in productivity and the decrease of product cost by operating alternatively the unloading and discharging of a product with two unloading means, by providing a pair of unloading means wherein while one means is directed to the position of product gripping, another is directed to the position of product discharging, and by moving pivotally to the reverse directions to each other a rotating shaft which supports integrally and free-rotationally each unloading means. CONSTITUTION:A second unloading means 30 is set up crossly in front view at the required angle, for example 60 deg. as it is directed to the position of product discharging when a first unloading means 20 is directed to the position of product gripping. The product gripper 50' of the second unloading means 30 is fitted on the same axis and in the neiborhood of a cylinder rod 34. On the other hand the gripper 50 of the first unloading means 20 is fitted to a cylinder rod 24 in eccentric relation through a connecting plate 60. The connecting plate 60 is composed of a flat plate in parallelogram form in front view extending to the lower part of the gripper 50 of the second unloading means 30, and a flat plate which is integrally formed at the lower end of the flat plate and extends to the side of the second unloading means 30. Consequently grippers 50, 50' can take the same position of product gripping, therefore interference between them does not occur.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to q.! The present invention relates to an automatic product take-out device for 115 machines, and in particular to an automatic product take-out HiPI that significantly shortens the required product take-out time.

BACKGROUND OF THE INVENTION Devices for automatically removing molded products from injection molding machines are known. Examples of this type of device include:
It is known that the air cylinder is arranged on one side of the injection molding machine, and has a pneumatically driven product gripping hand at the lower end of the cylinder rod of the air cylinder, and the air cylinder is provided so as to be able to reciprocate in the mold opening/closing direction. There is. This take-out device moves the cylinder rod downward and grasps the product in the movable mold with a hand when the molding of the product is completed and the movable mold is separated from the fixed mold and is in the mold open position. , horizontally move it to the fixed mold side and pull it out from the τ coin mold, then drive the cylinder rod to a position where the hand does not interfere with the gold W1! Later,
Rotate within the cross section of the mold by driving the rotating shaft 1! The hand is placed facing the product storage container, and after the product is pushed out into the container, it is returned to its original position. Therefore, the series of product removal operations described above takes a considerable amount of time.

On the other hand, there are products manufactured by injection molding machines that have low added value, such as bulges made by Plasdit//, and there is a desire to shorten the required manufacturing time.

Although the injection molding cycle execution time of injection molding machines has tended to be shortened in recent years, it takes time to take out the product as described in 1-1, and the overall required manufacturing time has not been sufficiently shortened.

The invention solves the following problems.
It is an object of the present invention to provide an automatic product take-out device for an injection molding machine that can reduce the size of bamboo, reduce product costs, and reduce product costs.

Means for Solving the Problem 4 The present invention is provided with attabutters each having a product gripper attached to the tip of a rod that moves, and when one of the rods moves toward the product gripping position, The first. a second extraction means; The first and second extracting means ( ) are integrally rotatably supported. a rotation coupling means for coupling the second rotation shaft and the inner core rotation shaft so as to rotate in opposite directions; a rotation piece a EF stage for driving one of the rotation shafts in forward and reverse directions;゜The second withdrawal means is gold! -゛1 chant in the closing direction 1 return 1! 1 ↑ Configuration J equipped with return drive means etc.: ((ru.

During the molding process using the injection molding machine, the 1st. The i12 ejecting means are located in a retreat area that does not interfere with the operation of the injection molding machine, one, for example the first ejecting means, facing the product gripping position and the other one facing the product gripping position.
], for example, when the second ejecting means is directed toward the one-item discharge position
: When the molding process is completed, the actuators of both take-out means move forward, and the product gripper of the first take-out means, which has reached the product gripping position, grips the product and simultaneously removes the product. The product gripper of the second ejecting means reaches the dispensing position and releases the product. Next, both the take-out means are driven by the reciprocating drive means, the first take-out means moves in the mold release direction, the product gripped by the first take-out means is pulled out from the mold, and both the actuators move backward and both take-out means are withdrawn. Once the zone is reached, the next injection molding cycle begins. During this molding process, the driving means 411 drives both the ejecting means in the anti-mold release direction, and the rotational driving means rotates.

In response to this rotational movement, the first rotating shaft integral with one of the extracting means, for example, the first extracting means, and the second rotating shaft coupled to the shaft by the rotational coupling means are rotated in opposite directions over the predetermined angle. and the angular positions of both extraction means are exchanged. Waiting for the end of the molding process, both actuators move to extend.
After C, the second take-out means grips the product molded this time, and 111'i! The +i rono means ejects the same molded product from 1, and then repeats the same operation as L'+4'r, and both ejecting means automatically eject 117 yen crystals at intersection 11.

Example Hereinafter, a detailed description of the present invention will be given with reference to the drawings.

Figures 1 to 4 show a device for taking out v1 from the product of an injection molding machine using a wooden block as an embodiment, and the injection devices N and 2 of the 11.1 injection molding machine are fixed. A fixed platen 4 has a side stand ν1 mounted thereon, a movable platen 4 has a movable mold 5 mounted thereon, and 6 a tie bar.

The automatic product take-out station 10 includes an M stand 11 fixed to the injection device 1, and a row of rollers, for example, on the side of the mold 3.5 of the base 11. 12゜12' is arranged, and supports the motor mounting base 14 on which the dryer 413 as a four-wheel drive means is placed on the right side of the slide 1.
- A cylinder 15 is fixed to the rear wall of the base 11, and the tip of the cylinder rod 15a is attached to the rear wall of the mounting base 14. It is fixed.

Friday) at 113.5] The first one facing from one side. The second ejecting means 20.30 is adjacent to the mold opening/closing direction and will be detailed later) 41'
The block bodies 21 are arranged so as to intersect each other when viewed from the front.
．． It has 31. The tip of a motor shaft 13a of the motor 13 as a first rotating shaft is fixed to this block body 21, and is supported by a bearing (not shown) provided on the front wall of the motor mount 14. The entire first take-out means 20 is supported so as to be able to rotate integrally with the shaft 13a. -/'J s Block body 31 has second rotating shaft 32
The front end of the shaft 32 is fixed, and the rear end of the shaft 32 is attached to the mounting base 1.
4, and is supported by a bearing 16 provided at 1.
The second ejecting means 30 is prevented from being detached from the mounting base 14 by a retaining mechanism, and the entire second ejecting means 30 is supported so as to rotate integrally. Gears 41 and 42 meshing with each other are fixed to the intermediate portions of the motor output 13a and the second rotating shaft 32 shown in FIGS. 1 and 3, respectively, and both shafts 13a,
32 in the opposite direction.

1st. The second ejecting means 20.30 is a block body 21.
．． Air cylinder 23.3 for vertical movement fixed to 31. '
A pair of elongated guide rods 25, 3 freely pass through both sides of the block body 21.31 and support and cover the cylinder rods 24.34 of each cylinder 23.33 as they move forward and backward.
5, and a product 1]11 holder 50.50' is attached and fixed to the tip of the cylinder rod 24.34. Both grippers 50.50' have the same configuration, grip 1, ~ grip 5.
0 as an example, a pair of product gripping pieces 51, 51 are connected to the gripper's cylinder 5 through links 52, 52 and 53.
4 cylinder rod j-i! '5 stuck to the tip [ノ,
As the cylinder 54 moves forward and backward,
51 is opened and closed, and a product (not shown) is taken out and grasped.

As shown in FIG. 2 and the accompanying drawing A.1 below, the first and second ejecting means 20.30 are used when one, for example, the first ejecting means 20, is directed to the product gripping position. The second take-out means are arranged at a predetermined angle, for example 60°, so as to face the product discharge position, and intersect with each other when viewed from the front. Furthermore, in order to simplify the operation, both extraction means 20.30
The grippers 50° and 50' assume the same product gripping position and are provided so as not to interfere with each other during operation. That is, while the product gripper 50' of the second takeout means 30 is attached to the cylinder rod 34 coaxially and adjacent to the rod 34, the gripper 50 of the first takeout means 20 is attached to the cylinder rod 34 via the connecting plate 60. The cylinder rod 44 is eccentrically connected to the cylinder rod 44.
It is MWed by Tsurad 4.

In this embodiment, the connecting plate 60 is integrally formed with a flat plate 61 having a parallelogram shape in front view extending below the gripper 50' of the second extraction means 30, and the lower end of the flat plate 61. It consists of a flat plate 62 extending toward the extraction means 30 side. As a result, the grippers 50°;)0' are arranged on the same axis as the grips facing the product discharge position, in other words, they can take the same product gripping position, and interference between the two never occurs. . A1 In Figure 2, 70 is the product gripper 50°50
Product 1 Container containing the product released from '. The air cylinders 15, 23, 33, 54 and the motor 13 are connected to appropriate control means, for example, a control device such as a numerical control device installed in an injection molding machine.

Next, with reference to FIGS. 5 to 8, the automatic product unloading device F? having the above-mentioned configuration will be explained. The operation of No. 10 will be explained.

During the molding process in the injection molding machine, the first and second ejecting means 20. Movable platen 4
It is located in the retreat area shown in FIGS. 1 and 5 where it does not interfere with the tie bar 6 and the like. At this time, the first degree second extraction means 20.3
0 face the product gripping position and product release position, respectively. After the molding process is completed and the molds 3 and 5 are opened, the air cylinders 23 and 33 are extended, and as shown in FIG. 6, the cylinder rod 24 is guided and supported by the guide rod 25 and 25. The gripper 50 attached to the lower end of the rod via the connecting plate 60 reaches the product gripping position, while the cylinder rod 34 is supported by the guide rods 35 and 35 and moves diagonally downward. The gripper 50' at the lower end of the cylinder rod 34 reaches the product release position. Furthermore, as can be understood from the explanation in section I.
Since the initial positions of the two grippers 50.degree. 50' are different, the two cylinder rods 24, 34 are moved down through different stroke lengths to compensate for this.

Next, the air cylinders of the grippers 50 and 50' (one side is
Illustrated at 5. Same below. ) move backward and forward respectively, and along with this, the gripping piece 51.5 is moved through the link 53.52.
1 for the closing and opening movements, respectively. As a result, the gripper 50
For example, grasp a part of the sprue (path shown in the figure) of the molded product left in the movable mold 5 that protrudes outward from the mold, and on the other hand,
The gripper 50' discharges the previously formed product held between its grippers into the container 70.

Next, the air cylinder 15 is operated backward, and the motor mounting base 14 connected to the cylinder rod 15a is moved to the roller row 12.
．． 12' and moves in the mold release direction J, that is, to the right in FIG. The first thing that was done was The second take-out means 20.30 moves toward the fixed mold 3 (the path shown after the movement), whereby the product gripped by the gripper 50 is moved to the movable mold 3. Release from the mold from I'+5.

Following this, the cylinder 23.33 is moved backward, the two ejecting means 20.30 return to the not-illustrated withdrawal area (same position as in front view in FIG. 5), and the next molding cycle begins. At the same time as this molding starts, the air cylinder 15 moves forward, and both the take-out means 20, 30 move horizontally in a counter-chest-shaped direction (to the left in FIG. 1) and return to the positions shown in FIGS. 1 and 5. Next, the motor 13 rotates in the normal direction, and the motor output shaft 13a, that is, the first rotating shaft, rotates clockwise by a predetermined angle, for example, 60 degrees in FIG. The second rotating shaft 32 is rotated at the same angle 60'' in the opposite direction.
Rotate. As both shafts 13a rotate 320 times, the first. Second
The ejecting means 20, 30 rotate integrally with the shafts 13a, 32, respectively, and intersect with each other to replace each other, reaching the driving position shown in FIG. 7 and facing the product ejecting position and the product gripping position, respectively.

During this cross movement, the first. In the second take-out means 20.30, the former flat plate 62 and the latter gripping piece are closest to each other, but they do not interfere in any way even in the cross position fffP (FIG. 7).

When the molding is completed and the molds 3 and 5 have finished opening, the air cylinders 23, 33 and 50, 50' are activated to grip the product instead of the gripper 50 used in the previous product removal. The product is gripped by the gripper 50' which has reached the position, and the previously taken out product is discharged from the gripper 50 which is in the product release position. Then, after the product is removed by the same operation as described above, both removal means 20.30
is moved to the withdrawal area shown in FIG. 7, and the next molding process is executed.

The next product take-out operation is the same as described above, except that the motor 13 is driven in reverse, so the explanation will be omitted. The second removal means 20.30 take out the molded products alternately, one of which stores the product in the container 70 while the other takes out the product.

In the above example, 1 product 1 x 110 moves, and after leaving the withdrawal area, molding starts and Jt returns 111! Output means 20
．． 30 is first moved in the anti-chest-shaped direction, and then moved in a cross motion, but various modifications are possible.

For example, after starting the molding in step 1, following the cross movement, the mold is driven in the anti-mold release direction τt'>, J: y. ``During molding, do not drive the mold in the anti-Ml direction (in Fig. 1) and take it out after the mold is opened after molding (Q20.
30 in the opposite 11111 J+'1 direction, gripper 5
Move the gripper 50°5 down by 0°50' and then move it roughly.
After moving 0' downward, move it in the opposite direction to release the mold (') J: Yes.

Effects of the Invention As described above, according to the present invention, a pair of ejecting means provided in such a manner that when one faces the product gripping position, the other faces the product discharging position, the respective ejecting means are rotated integrally. By rotating the freely supported rotating shaft in the opposite direction, the position of the corner frame is changed during each molding cycle, and at the end of each molding cycle, the molded product is taken out by one means, and the other is taken out. The previously taken out product is ejected from the ejecting means (), and the product ejecting means is made to alternately take out and release the product, so the time required to take out the product can be reduced by at least half compared to conventional methods. , it is possible to improve the productivity of injection molding machines and reduce product costs.

[Brief explanation of drawings]

Fig. 1 is a partially cross-sectional schematic side view of an automatic product take-out device according to an embodiment of the present invention, Fig. 2 is a view taken along the line ■-■ in Fig. 1, and Fig. 3 is a rotational coupling means of the same embodiment. FIG. 4 is a partially enlarged view showing the internal structure of the product gripper shown in FIG. 1, and FIGS. 5 to 8 show the operation of the above embodiment. It is a partial front view explaining. 10... Automatic product take-out device, 13... Motor, 1
3a... Motor output shaft (first rotating shaft), 14... Motor mounting base, 15.23, 33.54... Air cylinder, 15a, 24, 34.55... Cylinder rod, 20... ...first extraction means, 32...second rotating shaft,
40... Rotating coupling means, 41.42... Gear, 50
．． 50'... Product gripper, 51... Gripping piece, 60.
... Connecting plate, 70... Product storage container.

Claims (7)

[Claims] (1) Each actuator is equipped with a product gripper attached to the tip of a reciprocating rod, and the actuators are arranged at a predetermined angle to each other so that when one faces the product gripping position, the other faces the product release position. First and second take-out means, first and second rotating shafts that support the first and second take-out means so as to rotate integrally with each other, and a rotational coupling that couples both the rotating shafts so as to rotate in opposite directions. automatic product take-out of an injection molding machine, comprising: a rotating drive means for driving one of the rotation shafts in forward and reverse directions; and a reciprocating drive means for reciprocating the first and second take-out means in the mold opening/closing direction. Device. (2) The automatic take-out device for an injection molding machine according to claim 1, wherein the actuators of the first and second take-out means are constituted by air cylinders. (3) The first and second take-out means are arranged adjacent to the first and second rotating shafts in the axial direction, and the product gripper of the first take-out means is the same as the product gripper of the second take-out means. Claim 1 or 2 arranged on the axis and below the axis
An automatic product take-out device for an injection molding machine as described in Section 1. (4) The product gripper of the second take-out means is coaxially attached to the rod of the corresponding actuator, and
The product automatic injection molding machine according to claim 3, wherein the product gripper of the take-out means is attached to the rod of a corresponding actuator via a connector extending from the rod of the actuator to the lower position. Retrieval device. (5) The co-rotating coupling means is a gear fixed to the first and second rotating shafts and screwed into each other. Automatic product take-out device for injection molding machines. (6) A patent in which the rotational drive means comprises a motor, and the reciprocating drive means comprises a motor mount on which the motor is fixedly mounted and is slidable relative to the injection molding machine, and a cylinder actuator that reciprocates the mount. An automatic product take-out device for an injection molding machine according to any one of claims 1 to 5. (7) The automatic product take-out device for an injection molding machine according to any one of claims 1 to 6, wherein the product gripper has a built-in air cylinder actuator that opens and closes the gripping pieces.