JPH0320102Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a molded product take-out device that automatically takes out a molded product from, for example, a plastic injection molding machine.

"Prior Art and its Problems" A molded product ejection device is used in plastic injection molding machines and the like to automate molding operations. Conventionally, when a pair of molds that perform an opening/closing operation are opened, such a take-out device causes an arm having a suction means at the tip to enter between the pair of molds from above, and transfers the molded product to one of the molds holding the molded product. After bringing the suction means close to each other and holding the molded product by suction, the suction means is moved away from the mold to extract the molded product, and the arm is pulled upward to take out the molded product from between the molds. I've been doing this.

However, in the conventional molded product ejecting device as described above, the molded product is held in the direction in which the arm enters and retreats between the pair of molds, and in the state in which the arm enters between the pair of molds. It was necessary to operate the arm in two directions: the direction in which the suction means approaches the mold and the direction in which it moves away from it. Therefore, there was a problem that it took a long time to take out the molded product. In a plastic injection molding machine, plastic is injected and molded when a pair of molds are closed, and the molded product is taken out when the pair of molds is opened. Although it is easy to speed up the molding cycle, as described above, the time required to take out the molded product becomes a hindrance, making it impossible to improve the molding efficiency.

"Purpose of the invention" The purpose of the invention is to provide a molded product removal device that solves the problems of the above-mentioned conventional technology, further reduces molded product removal time, and improves molding work efficiency. There is a particular thing.

"Structure of the invention" The molded product ejecting device according to the invention includes a slider 17 that can move forward and backward in a direction B parallel to the gap between a pair of molds 13 and 14, and a frame attached to the slider 17 via a support shaft 21. 23, and within this frame 23, the molds 13, 1
A block 28 is mounted to be movable in the opening/closing direction A of 4, and the mold 13, which is inserted through this block 28,
A movable rod 24 extending in the direction of the gap between the movable rods 24, molded product holding means 25 and 26 attached to the tip of the movable rod 24, and a piston rod supported by the block 28 and moving back and forth in the axial direction of the movable rod 24. 37
an air cylinder 35 which interlocks the movable rod 24 via a movable plate 38 attached to the piston rod 37; an air cylinder 35 provided between the movable plate 38 and the frame 23 and having a cam groove 46; Cam plate 40
and a roller 48 that fits into the cam groove 46, and the cam groove 46 has a straight portion 46a and an inclined portion 46b.
When the roller 48 passes through the straight portion 46a,
When the driving force of the air cylinder 65 is converted into axial movement of the movable rod 24 and the roller 48 passes through the inclined portion 46b,
The driving force of the air cylinder 35 is applied to the block 2.
8, the molds 13 and 14 are moved in the opening/closing direction A.

Therefore, when the molded product holding means 25, 26 enter the gap between the pair of molds 13, 14, the slider 17 is moved in the direction of the molds 13, 14,
At the same time, the air cylinder 35 supported by the slider 17 via the spindle 21, the frame 23, and the block 28 is operated to push out the movable rod 24, so that the moving speed of the slider 17 + the pushing speed of the air cylinder 35 is increased. , molded product holding means 2
5,26 can be entered. Similarly, when retracting the molded product holding means 25 and 26 from the gap between the pair of molds 13 and 14, the molded product holding means 25 and 26 are 26 can be retracted.

Furthermore, when the molded product holding means 25 and 26 enter the gap between the pair of molds 13 and 14, the driving force of the air cylinder 35 is applied to the molds 13 and 14 by the cam plate 40 and roller 48 that constitute the guide means. The direction toward the gap 14 can be converted into the opening/closing direction A of the molds 13 and 14. That is, when the roller 48 passes through the straight portion 46a of the cam groove 46 of the cam plate 40, the movable rod 24 is pushed out in the axial direction, and the molded product holding means 25, 26 enter the gap between the molds 13, 14. However, when the roller 48 moves to the inclined part 46b of the cam groove 46 of the cam plate 40, the block 2
8 in the opening/closing direction A of the molds 13, 14 acts, and the molded product holding means 25, 26 come close to the molded product holding surface of either one of the molds 13, 14. In this way, with the driving force of one air cylinder 35, the molded product holding means 25 and 26 are moved into the gap between the pair of molds 13 and 14, and the mold 1
The operation of bringing the molded product holding surface closer to either one of the molded product holding surfaces 3 and 14 can be performed continuously.

After the molded product is held by the molded product holding means 25 and 26, the molds 13 and 1 are moved in the opposite manner to the above.
The operation of separating the molded product from one of the molds 13 and 14 and the operation of retreating from the gap between the molds 13 and 14 can be performed continuously.

``Embodiment of the invention'' FIGS. 1 to 5 show an embodiment of a molded product take-out device according to the invention.

As shown in FIG. 1, this molded product removal device 1
1 is applied to a plastic injection molding apparatus 12. Plastic injection molding equipment 12
has a pair of molds 13 and 14, and this mold 1
3 and 14 are opened and closed as shown by arrow A in the figure to perform the molding operation.

A support stand 15 for the molded product removal device 11 extends from the side of the plastic injection molding device 12 . A plurality of rails 16 are arranged on the support base 15 in a direction parallel to the gap between the molds 13 and 14, that is, in a direction shown by arrow B in the figure. A slider 17 that is movable along this rail 16 is installed on the support stand 15.

Referring also to FIG. 2, the slider 17 has a frame shape surrounding the support base 15, and is fitted and supported by the rail 16 via a bearing or the like. Further, a screw shaft 18 is attached to the support base 15 in parallel with the rail 16, and the slider 17 is screwed onto this screw shaft 18. The screw shaft 18 is rotated in forward and reverse directions via a timing belt 19 by a motor 20 installed on the support base 15, thereby causing the slider 17 to move in the direction of arrow B along the rail 16. It's becoming like that.

A support shaft 21 extending in a direction perpendicular to the rail 16 is rotatably held by the slider 17 . In this case, the support shaft 21 is rotated by an air rotation actuator 22 installed on the slider 17. A movable rod 24 is attached to the tip of the support shaft 21 via a frame 23 so as to be orthogonal to the support shaft 21.
A suction plate 25 is attached to the tip. A suction cup 26 connected to a suction means is attached to the suction plate 25, so that the molded product can be suctioned and held, and also can be removed by releasing the suction. The suction plate 25 and the suction cup 26 constitute molded product holding means in the present invention.

As shown in FIGS. 3, 4, and 5, a block 28 is movable in the direction of arrow A within the frame 23 attached to the tip of the support shaft 21 via a pair of guide bars 27, 27. is supported by The movable rod 24 described above is supported through the block 28 via a bearing 29. Further, a gear 30 is attached to the movable rod 24, and the gear 30 is connected to the movable rod 2 by a key 31.
It is designed to rotate together with 4. moreover,
An air rotary actuator 32 is attached to the block 28, and a gear 34 attached to its rotating shaft 33 meshes with the gear 30. Therefore, the operation of the air rotation actuator 32 causes the movable rod 24 to rotate via the gears 34 and 30.

Further, an air cylinder 35 is fixed to the block 28 via brackets 36, 36.
The air cylinder 35 is separate from the frame 23 and is configured to move together with the block 28 in the direction of arrow A in the figure. And air cylinder 35
The tip of the piston rod 37 is fixed to a movable plate 38 disposed in front of the frame 23. The movable rod 24 is connected to the movable plate 3.
8, and a spring 39 is attached to the front protrusion of the movable rod 24. The spring 39 is arranged between the movable plate 38 and the attachment portion of the suction plate 25. Therefore, when the movable plate 38 is pushed forward via the piston rod 37 by the operation of the air cylinder 35, the movable rod 24 is also pushed out via the spring 39.

Also, the cam plate 40 is placed approximately parallel to the movable rod 24.
The front end of the cam plate 40 is fixed to the movable plate 38 with bolts 41. On the other hand, a support member 42 is attached to the rear end of the movable rod 24, a guide 43 is formed on the support member 42, and the rear end of the cam plate 40 is inserted through the guide 43. In this case, when the movable plate 38 moves backward via the piston rod 37 due to the operation of the air cylinder 35 and the cam plate 40 moves rearward accordingly, the stepped portion 44 of the cam plate 40 engages with the guide 43. , the movable rod 24 is moved rearward via the support member 42. The forward movement of the movable rod 24 is prevented from moving beyond a certain length by the support member 42 engaging a stopper 45 fixed to the block 28.

A cam groove 46 is formed in the cam plate 40, and the cam groove 46 has a straight portion 46a at the front.
The rear side forms an inclined portion 46b. frame 23
A shaft 47 is fixed to the shaft 47, and a roller 48 attached to the shaft 47 is inserted into the cam groove 46. Therefore, when the cam plate 40 moves in the direction of arrow B in the figure due to the operation of the air cylinder 35, the roller 48 reciprocates within the cam groove 46. When the roller 48 passes through the inclined portion 46b, the cam plate 40 is swung in the direction of arrow A in the figure. When the cam plate 40 moves forward due to the operation of the air cylinder 35, the stopper 45 stops the movable rod 24 from moving forward when the roller 48 is located at the boundary between the straight portion 46a and the inclined portion 46b. Movement was restricted, and from then on,
By compressing the spring 39, the cam plate 4
Only 0 moves forward. The cam plate 40 having the cam groove 46 and the roller 48 that fits into the cam groove 46 constitute the guide means in the present invention.

Next, the operation of this molded product removal device 11 will be explained.

In the plastic injection molding apparatus 12, as described above, molding is performed when the pair of molds 13 and 14 are closed, and the molded product is ejected when the molds 13 and 14 are opened. Figure 1 shows
The molds 13 and 14 are shown in an open state, and the molded product is held within one mold 14.

In this state, the screw shaft 18 is rotated by the operation of the motor 20, and the slider 17 is moved onto the support base 15.
along the rail 16 in the direction of the molds 13 and 14. At the same time, the movable plate 38 is pushed forward by the operation of the air cylinder 35, and the movable rod 24 is pushed forward via the spring 39. As a result, the suction plate 25 attached to the tip of the movable rod 24 moves the molds 13 and 1 at the moving speed of the slider 17 + the moving speed of the movable rod 24.
Enter the gap in number 4.

When the movable plate 38 is pushed forward by the operation of the air cylinder 35, the cam plate 40 also moves forward, so the roller 48 disposed in the cam groove 46 moves relatively along the straight portion 46a. When the roller 48 reaches the boundary between the straight part 46a and the inclined part 46b, the support member 42 at the rear end of the movable rod 24 hits the stopper 45, and the movable rod 2
The forward movement of 4 is stopped.

Even if the forward movement of the movable rod 24 stops, the movable plate 38 compresses the spring 39 and moves further forward, and the cam plate 40 also moves further forward, causing the roller 48 to move along the slope 46b. Move relative. As a result, the cam plate 40 swings toward the mold 14 in the direction A in the figure. As the cam plate 40 swings, the block 28 supporting the movable rod 24 moves along the guide bar 27, and the suction plate 25 supported at the tip of the movable rod 24 approaches the mold 14. In this state, the suction cup 26 holds the molded product in the mold 14 by suction.

Next, the air cylinder 35 operates in the opposite direction,
The movable plate 38 and the cam plate 40 begin to move in the direction of arrow B in the figure in the opposite direction.
The roller 48 has an inclined portion 46 within the cam groove 46.
b toward the straight line portion 46a. Accompanying this, the cam plate 40 swings away from the mold 14 in the direction of arrow A in the figure, and the block 28 similarly moves along the guide bar 27.
As a result, the movable rod 24 moves away from the mold 14 in the direction of arrow A in the figure, and the suction plate 25 separates from the mold 14 to take out the molded product.

The cam plate 40 moves backward, and the roller 48 moves between the inclined part 46b and the straight part 4 in the cam groove 46.
6a, the step 44 at the rear end of the cam plate 40 engages with the guide 43 and begins to move the movable rod 24 backward through the support plate 42. At this time, the slider 17 also begins to move away from the molds 13 and 14 in the direction of arrow B in the figure. Therefore, the suction plate 25 moves the mold 1 at the moving speed of the slider 17 + the moving speed of the movable rod 24.
Retreat through the gap at 3 and 14. In this way, the molded product is pulled out from the gap between the molds 13 and 14 while being held by the suction cups 26 of the suction plate 25. Then, the molds 13 and 14 are closed again to perform the next molding operation.

Note that after the molded product is extracted from the gap between the molds 13 and 14, the air rotation actuator 22 is operated and the support shaft 21 that supports the frame 23 is moved in the direction indicated by the arrow C in FIG.
direction, the movable rod 24 is reversed, and the suction plate 25 is positioned on the left side in FIG. Subsequently, the air rotation actuator 32 is operated, and the movable rod 24 is rotated 90 degrees in the direction of arrow D in FIG. In this state, the suction of the suction cup 26 is released, and the molded product falls onto a belt conveyor (not shown).

In the above embodiment, the suction plate 25 and the suction cup 26 are used as the molded article holding means, but a molded article holding means that grips and holds the molded article may also be used.

"Effects of the invention" As explained above, according to the invention, the movement speed of the slider + the movement speed of the air cylinder,
The molded product holding means can enter and retreat into the gap between the pair of molds. By means of a guide means composed of a cam plate having a predetermined cam groove and a roller that fits into the cam groove, the driving force of the air cylinder moves the molded product holding means from a direction parallel to the gap between the pair of molds.
It is continuously transformed in the direction orthogonal to it. Therefore, it becomes possible to quickly take out the molded product, speed up the cycle of the molding device, and improve work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the molded product ejecting device according to the present invention, Fig. 2 is a partially cutaway left side view of the device, Fig. 3 is a partially enlarged plan view of the device, and Fig. 4 is a partially enlarged front sectional view of the same device, and FIG. 5 is a sectional view taken along the - line in FIG. 4. In the figure, 11 is a molded product removal device, 12 is a plastic injection molding device, 13 and 14 are molds, 15 is a support stand, 16 is a rail, 17 is a slider, 21 is a spindle, 23 is a frame, and 24 is a movable rod. , 25
is a suction plate, 26 is a suction cup, 27 is a guide bar, 28 is a block, 35 is an air cylinder, 38
is a movable plate, 39 is a spring, 40 is a cam plate, 42 is a support member, 43 is a guide, 44 is a stepped portion,
45 is a stopper, 46 is a cam groove, 46a is a straight portion, 46b is an inclined portion, and 48 is a roller.

Claims (1)

[Scope of claims for utility model registration] (1) Direction B parallel to the gap between the pair of molds 13 and 14
a slider 17 that can move forward and backward; a frame 23 attached to the slider 17 via a support shaft 21;
A block 28 is mounted so as to be movable in the opening/closing direction A of the mold 1.
A movable rod 24 extending in the direction of the gap between parts 3 and 14.
It has molded product holding means 25 and 26 attached to the tip of the movable rod 24, and a piston rod 37 that is supported by the block 28 and moves forward and backward in the axial direction of the movable rod 24. an air cylinder 35 that interlocks the movable rod 24 via an attached movable plate 38; the movable plate 38; and the frame 23.
a cam plate 40 having a cam groove 46 and a roller 48 that fits into the cam groove 46;
The cam groove 46 has a straight portion 46a and an inclined portion 46.
b, when the roller 48 passes through the straight section 46a, the driving force of the air cylinder 35 is converted into axial movement of the movable rod 24, and when the roller 18 passes through the inclined section 46b. A molded product take-out device characterized in that the driving force of the air cylinder 35 is converted into movement of the block 28 in the opening/closing direction A of the molds 13 and 14. (2) A spring 39 is interposed between the movable plate 38 and the molded product holding means 25, 26, and when the roller 48 is located at the boundary between the straight portion 46a and the inclined portion 46b, the movable rod The molded product ejecting device according to claim 1, which is provided with a stopper 45 for preventing forward movement of the molded product 24 in the axial direction. (3) Utility model registration claim 1 in which the support shaft 21 and the movable rod 24 are rotatable.
The molded product removal device according to item 1 or 2.