JPS62161451A - Gate breaking apparatus for injected forming product - Google Patents

Abstract

PURPOSE:To reduce labor and equipment cost by turning an injected products supplied on a holding table together with the holding table and breaking a gate by striking against a gate breaking member. CONSTITUTION:When a chuck 4 is turned by 90 deg. of angle, a work 3 is changed from a vertical attitude to a horizontal attitude, and when the chuck 4 is opened, the work 3 is loaded on the bottom plate 14a of the holding table 14. When a clamp 19 is shifted to horizontal direction and downward by a cylinder 17, 18 respectively, the work 3 is held by the clamp 19 and the holding table 14. A sprue 6 is abutted on a projecting part 21 by turning clockwise the holding table 14 by motor driving, and then the sprue 6 is broken by turning furthermore and contained in a carrying cart 28. When the holding table 14 is turned counterclockwise by the reverse rotation of motor, a runner 7 is abutted to the projecting part 21 and contained in the carrying cart 28 after breaking. Then, the holding table 14 is stopped at the position with the bottom plate 14a upward for it and the clamp 19 downward for it, and also a cylinder 22 for sliding chute is worked to go forward below the inversed holding table 14. The clamp 19 is withdrawn toward horizontal direction and the work 3 is released.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sprue or runner for an injection molded product formed by a die casting machine, a plastic injection molding machine, or the like.

This invention relates to a weir folding device for injection molded products that cuts off weirs such as overflow.

[Conventional technology]

A mold in, for example, a die-casting machine as an injection molding device is divided into a fixed mold and a movable mold that moves forward and backward in a direction toward and from the fixed mold to clamp and open the mold. This mold has
A cavity is formed on both sides or one side of the split-sided gold ingot, and by supplying molten metal to a sleeve provided in a fixed mold and extruding it with the plunger of an injection cylinder,
sleeve.

It is injected into the chamber through sprues, runners, gates, etc. As the molten metal in this cavity solidifies and cools, a cast product as an injection molded product is obtained.The mold is opened and the cast product is extruded by an extrusion device, gripped by an ejection device, and transported. , released outside the aircraft.

The cast product thus obtained has the above-mentioned sprue.

Since there are weirs as surplus solidified material caused by the solidification of the molten metal injected into the runners, gates, etc., these weirs must be cut off after being collected outside the machine. Conventionally, cutting of this weir was done by using a die such as a hammer or the like, or the cast product was held with a clamp member and the weir protruding from this clamping device was sheared with a machine such as a press or shear. .

[Problem that the invention seeks to solve]

However, when cutting by striking with a hammer etc.
This was extremely troublesome and required a great deal of labor, including transportation. Further, when a press machine or the like is used, there is a problem in that not only the press machine is expensive, but also the clamp member for gripping the cast product must have high precision, which increases the equipment cost.

[Failure to solve the problem]

In order to solve such problems, the present invention includes a holding stand that holds an injection molded product with an attached weir, is rotatably supported on the device frame side, and is rotated by a predetermined angle by a drive device; A weir folding member was provided which was fixed to the apparatus frame and located within the rotation locus of the weir of the injection molded product which was rotated while being held by the holding table.

[Effect]

When the injection molded product is fed and held on the holding table manually or by a product take-out device, and the holding table is rotated using a drive device,
The weir attached to the injection molded product comes into contact with the weir folding member, breaks and falls. When the holding base is further rotated in the opposite direction, the weir on the opposite side comes into contact with the weir folding member, breaks and falls. The injection molded products with broken weirs are released from the holding table and then slide on the chute or the like and are accumulated.

〔Example〕

1 to 4 show an embodiment of the folding device for injection molded products according to the present invention, FIG. 1 is a front view thereof, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. Figure 4(a)~
(h) is a schematic front view of main parts shown for explaining the operation. In the figure, in the case of this embodiment, the weir folding device 1 is installed near the die-casting machine, 2 is an arm provided in the product take-out device, and 3 is an injection molded product held by this arm 2 ( (hereinafter referred to as work).

In other words, the workpiece 3 formed by the die-casting machine is
It is held by a rotatable chuck 4 at the tip of the arm 2 and transported above the weir folding device 1. The workpiece 3 is integrally formed with a molded product 5, an attached sprue 6 as a weir, and a runner T used for degassing, and when transported, it is shown in Figs. 1 and 4 ( It is held in a vertical position as shown in a).

The weir folding device 1 includes a two-tiered frame 8 formed of shaped steel and extending long above the floor surface, with a pair of bearings 9, 10
are fixed concentrically.

The motor shafts of a coaxial geared motor 11 with a brake and a torque motor 12 supported by the frame 8 are rotatably supported on the bearing 9, and a rotary manifold 13 is mounted on the bearing 1°. is rotatably supported. Both shafts supported by bearings 9 and 10 have a rectangular bottom plate 14m and vertical members 14b at both ends of the bottom plate on the bearings 9 and 10 side.
The vertical members 19b are each fixed to a holding stand 14 integrally formed with the holding stand 14 and the rotary manifold 13 are integrally moved forward and backward by a predetermined angle as the motors 11 and 12 rotate. It is configured to rotate in the direction. 15 is a striker that rotates together with the holding base 14; 16;
is a limit switch. Then, the workpiece 3, which has been released from its holding by the rotation and opening/closing of the chuck 40 at the tip of the arm 2, is placed on the holding table 14 with its posture changed from a vertical posture to a horizontal posture. The holding table 14 is equipped with a pair of clamps 19 that move vertically and horizontally at predetermined timings using a plurality of cylinders 17 and 18. It is configured to be firmly held by movement and vertical movement. 20 is a cylinder for confirming the original position. With this structure, the workpiece 3 placed on the holding stand 14 and held by the clamp 19 is moved clockwise at a predetermined angle from the horizontal position shown in FIG. It rotates by a predetermined angle, then stops, and then rotates counterclockwise by a predetermined angle.

Reference numeral 21 denotes a protruding piece as a weir folding member that is supported by the vertical member 8b of the frame 8 and protrudes in the horizontal direction. Once positioned, the sprue 6 and the second sprue 7 are configured to come into contact with the protrusion 21 of the dowel and break when the workpiece 3 is rotated in the forward and reverse directions. On the other hand, behind the holding table 14, a slide chute cylinder 22 is supported by a horizontal member 8a and provided in an inclined manner, and a slide chute 23 formed in a long frame shape is provided on the piston rond.
is fixed, and by moving the piston rond forward and backward, the system slide chute 23 moves between the waiting position shown by the solid line in Fig. 1 and the downward advancement position of the workpiece 3 shown by the chain line. It is configured. Reference numeral 24 denotes a fixed chute that is installed continuously at the advanced position of the slide chute 23 and at approximately the same slope. It is configured so that the workpiece 3 that slides after being released onto the slide chute 23 continues to slide. 25
is a workbench supported horizontally at the front end of the frame 8 via an adjustment screw 26t. Further, below the holding table 14, a guide 2T is supported by the frame 8 and is arranged to guide the falling of the folded sprue 6 and runner 7. A movable transport vehicle 28 is provided to receive and store the sprue 6 and runner T. 29 and 30 are handles for adjusting the positions of the protruding piece 21 and the guide 27, respectively.

In FIG. 4(a), which explains the operation of the weir folding device 1 configured as described above, the workpiece 3 is folded into the arm 2 after being formed.
The clamp 19 of the holding table 14 is moved horizontally and opened upward. The slide chute 23 has moved to the waiting position. When the chuck 4t is rotated by -90 degrees from this state, the posture of the workpiece 3 is changed from a vertical posture to a horizontal posture, and when the chuck 4 is opened, the workpiece 3 is placed on the bottom plate 14& of the holding table 14. and said cylinder 17°1
When the clamp 19 is moved horizontally and downward by the clamp 8, the workpiece 3 is firmly held by the clamp 19 and the holding table 14, as shown in FIG. 4(b). Next, when the motors 11 and 12 rotate, the holding base 14 rotates clockwise in FIGS. 1 and 4, and the sprue 6 comes into contact with the protrusion 21 as shown in FIG. 4(c). If the rotation is continued further, the sprue 6 breaks and falls into the transport vehicle 2B as shown in FIG. 4(d).

When the holding table 14 stopped in this state is rotated counterclockwise in the figure by the reverse rotation of the motors 11 and 12, as shown in FIG.
When the runner 7 comes into contact with the protruding piece 21 as shown in e) and continues to rotate, the runner 1 breaks and falls into the transport vehicle 28 as shown in FIG. 4(f). At this time, the holding table 14 stops in a slightly inclined state with the bottom plate 14m at the top and the clamp 19 at the bottom, and the slide chute cylinder 22 operates and its piston rond moves forward.
As shown in FIG. 4(f), it advances below the holding table 14 which is inverted. In this state, the clamp 19 is
) opens downward and moves away horizontally, the workpiece 3 is released from the clamp 19 and is ejected onto the slide chute 23 as shown in FIG. gliding. Fixed chute 24
The upper workpiece 3 slides thereon toward the workbench 25, and after a predetermined work is performed on the workbench 25, it is accumulated.

On the other hand, the holding table 14 that has finished discharging returns to the horizontal position with the bottom plate 14m facing down, as shown in FIG. 4(h), and the slide chute 23 retreats to the waiting position. After this, the operations shown in FIG. 4 (&) to (h) are repeated.

Note that depending on the position of the holding base 14, the sprue 6, the runner 7, etc., and the position of the weir, it may be sufficient to rotate only the clockwise direction in the figure. Further, the treatment of the workpiece 3 after breaking the weir and the treatment of the weir are not limited to the apparatus shown in the embodiment. Furthermore, the workpiece 3 is manually moved to the holding table 14.
It may also be fed upwards.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the weir-folding device of the injection molded product is held by holding the entire injection molded product with the weir attached, and is rotatably supported on the frame side and rotated by the drive device. The holding stand is composed of a holding stand that is driven to move, and a folding member that is fixed to the device frame and located within the rotation trajectory of the injection molded product that is held and rotated by the holding stand. The structure is such that the injection molded product fed upward is rotated together with the holder and the weir is brought into contact with the weir folding member and folded, so that the weir can be folded simply by feeding the injection molded product onto the holder. Since the cutting process is performed by cutting, the labor required is significantly reduced compared to the conventional method of folding with a hammer, etc., and there is no problem with performance even if the holding position of the holding stand shifts slightly, so cutting with a conventional press machine is possible. Compared to conventional methods, precision is not required for the holding device for injection molded products, and equipment costs are reduced.

[Brief explanation of drawings]

1 to 4 show an embodiment of the folding device for injection molded products according to the present invention, FIG. 1 is a front view thereof, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. Figure 4 (,)~
Figure 9) is a schematic front view of the main parts shown in Figure 9 to explain the operation. 1...Folding device, 3...Injection molded product, 5...
... Molded product, 6... Sprue, 7 Exposure... Runner, 8
φ・111+Frame, 9.10@・・・Bearing, 11・
...Geared motor with brake, 12...Torque motor, 14.lI+1.Holding stand, 17.18---Cylinder, 19 #a 11 #2 ring, 21...
・Protrusion. Patent applicant Yamaha Motor Co., Ltd. agent Masaki Yamakawa (#1 or 2) Figure 4 (a) 2] (b) Figure 4 (d) (e)

Claims (1)

[Claims] A holding table that holds an injection molded product with a weir and is rotatably supported on the equipment frame side and is rotated by a predetermined angle by a drive device, and the injection molded product that is held and rotated by this holding table. A weir folding device for injection molded products, characterized in that a weir folding member is provided, which is located within the rotation locus of the weir, is fixed to the device frame side, and brings the weir into contact with the weir.