JPH022407B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a molded product ejecting device for an injection molding machine, particularly a vertical mold clamping device in which a plurality of movable molds advance and retreat in the vertical direction relative to a fixed mold below to open the mold. The present invention relates to an automatic product take-out device for an injection molding machine equipped with a vertical mold clamping device (hereinafter referred to as a vertical mold clamping device).

In general, an automatic ejection device for an injection molding machine is necessary to save labor and increase speed by fully automating the molding operation, and also to ensure worker safety and reduce fatigue when molding large molded products. It is essential. Many types of automatic product ejecting devices have been proposed, and most of them are capable of automatically ejecting products, automatically ejecting sprues and runners, automatically inserting metal inserts into molds, and combining and adhering products. It is used for secondary processing of products, transportation and storage of products, etc., and recently a series of related operations from product removal to secondary processing, assembly, and transportation are performed by computer control. Robots are also being developed.

However, in the case of an injection molding machine equipped with a vertical mold clamping device as described above, unlike a general injection molding machine with a horizontal mold clamping device, the product ejected by the extrusion pin after mold release is released naturally from the mold. Because they do not fall, it is difficult to handle continuously molded products efficiently and automatically, and for simple tasks, methods such as grasping the molded products using the suction force of a vacuum chuck or clamping with telescopic links are used. Conventional methods, such as using metal fittings to manipulate a cylinder to grab the molded product, were sufficient to some extent, but high-cycle molding,
Conventional methods have been inconvenient because they do not have a consistent method for taking out products, even though they must meet many demands such as labor saving and efficient production.

Therefore, in order to obtain a product removal method that satisfies the above requirements, we have carried out many improvements and prototypes.As a result, we have found that a single product receiving method can be used in an injection molding machine that has two or more vertical mold clamping devices. The configuration is such that the table is automatically moved alternately between the cores of the mold clamping device according to the molding cycle time by setting a timer, and the molded products are taken out and transferred continuously and efficiently to the product receiving conveyor for the next process. It has been found that it is possible to obtain a product take-out device that is simple and has excellent molded product take-out operations.

Therefore, a general object of the present invention is to efficiently process the molded products by alternately taking out the molded products and continuously discharging them to a predetermined position in an injection molding machine having a plurality of vertical mold clamping devices. We are here to provide you with the equipment.

To achieve this objective, the present invention provides an injection molding machine having 22 or more vertical mold clamping devices, in which a single product pedestal is automatically moved between each mold clamping device alternately according to the molding cycle. The mold is configured to be movable and come between the movable mold and the fixed mold when each mold clamping device opens the mold, and further a product conveyor is disposed corresponding to the product holder. do.

Specifically, multiple mold clamping devices that also serve as one horizontal injection device are installed, and a movable stand is installed in parallel with these mold clamping devices, straddling the injection devices or extending to the opposite side. A product holder is arranged on the movable pedestal so that it can be moved freely and moved between the movable mold and the fixed mold when the mold is opened by the mold clamping device, and a product conveyor is placed at the end of the movable pedestal. Face the end. That is, as will be explained later, the product conveyor is arranged at an angle of 90 degrees with respect to the movable frame.

The product holder is composed of an upper holder, a lower holder, and a guide roll that is interposed between the upper and lower holders to move the upper holder below the mold clamping device. It is constructed in the form of a conveyor with belts stretched across multiple rolls, and is driven by a suitable drive device, while moving wheels are attached to the lower part of the lower pedestal, driven by a suitable drive device, and equipped with a braking mechanism. to control movement.

The belt surface of the upper pedestal can be covered with felt, fluffy cloth, or artificial turf to protect the molded product, and an elevating device is installed below the product pedestal to serve as a mold clamping device. alignment can be performed.

Other objects and advantages of the invention will become more apparent from the following description.

Next, an example of the structure of an automatic product take-out device for an injection molding machine according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, the automatic product take-out device for an injection molding machine according to the present invention includes a movable pedestal 16 installed parallel to a plurality of mold clamping devices 12 and 14 provided in correspondence with an injection device 10; A product holder 18 disposed on the movable pedestal 16 and capable of reciprocating along the longitudinal direction of the movable pedestal 16 and movable below the mold clamping devices 12, 14; It basically consists of a product conveyor 20 extending in the direction.

In FIG. 2, the mold clamping device 14 includes a mold clamping cylinder 22 fixed to a fixed die plate 24, and a fixed mold 26 supported by the fixed die plate 24.
and a movable die plate 32 that is attached to the piston 28 of the mold clamping cylinder 22 and holds the movable die 30. As will be explained in detail later, the movable die plate 32
When the product attached to the mold 0 falls, the product holder 18 is configured to come below the movable mold 30 to receive it.

The movable frame 16 consists of a base 34 arranged in parallel at predetermined intervals, a rail 36 laid on the base 34, and a plurality of supporting legs 38 for supporting the base 34. As mentioned, mobile mount 1
6 is arranged to straddle the injection device 10.

In FIG. 3, the product pedestal 18 is the upper pedestal 3.
9 and a lower pedestal 40, these upper and lower pedestals 3
A plurality of guide rolls 42 are interposed between 9 and 40 to move the upper pedestal 39 below the mold clamping devices 12 and 14.

The upper pedestal 39 also consists of a plurality of rolls 44 and an endless belt 46 surrounding these rolls 44,
The molded product received from the mold clamping device is transferred to the product conveyor 20 by being driven by an appropriate drive device (not shown). Incidentally, the surface of the belt 46 may be covered with felt, fluffy cloth, or artificial grass to cushion and protect the molded product.

On the other hand, wheels 48 are attached to the lower part of the lower pedestal 40 and are rolled along the rails on the movable pedestal 16. The lower pedestal 40 is driven by a reversible transmission or a hydraulic or pneumatic cylinder (not shown), and is further braked by an appropriate brake device (not shown). A mechanical drive device 50 is also provided at the end of the lower pedestal 40 to drive the guide roll 42 via a suitable chain or belt.

Note that an elevator 52 is provided below the lower pedestal 40 to enable alignment with the mold clamping devices 12 and 14.

Next, when the product take-out device of the molding machine according to the present invention configured as described above is operated, in the step of continuously performing molding using the dual type mold clamping devices 12 and 14, the molding in one of the mold clamping devices 14 is performed. the work is completed,
When the mold is opened and the molded product 54 is released from the movable mold 30 while remaining attached to the movable mold 30, the product holder 18 that has been waiting in advance moves forward as shown by the imaginary line in FIG. It receives the molded product 54 falling from the mold 30 and returns to its original position. That is, the movable frame 18 that was in the No. 2 mold clamping position travels to the No. 1 mold clamping position, transfers the molded product to the product conveyor 20 under the rotation of the belt 46, and transfers the molded product to the mold clamping device 12. Wait until the molding work is completed. This series of ejecting operations is performed in accordance with the operation of the mold clamping device, so
There is no problem at all even if the cycle time is shortened because the number of times the molded product is taken out per shot is large; in fact, the higher the injection speed, the more effective the molded product takeout can be.

According to the automatic product take-out device for an injection molding machine according to the present invention, precision molded products such as lenses and videos, or insert molded products, which were traditionally difficult to handle in an injection molding machine having a vertical mold clamping device, can also be handled. It is convenient to handle because it can be easily processed, and because the mechanism is simplified, it is easy to operate and the manufacturing cost is low and economical.

The typical configuration example of the automatic product take-out device for an injection molding machine according to the present invention has been described above.
Of course, various design changes can be made without departing from the purpose and spirit of the invention.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the arrangement of an automatic product take-out device of an injection molding machine according to the present invention, FIG. 2 is a partially sectional front view of the automatic product take-out device shown in FIG. 1, and FIG.
The figure is a side view of the movable frame. 10... Injection device, 12, 14... Mold clamping device, 16
...Moving frame, 18...Product holder, 20...Product conveyor, 22...Mold clamping cylinder, 24...Fixed die plate, 26...Fixed mold, 28...Piston, 30...
Moving mold, 32... Moving die plate, 34... Base, 36... Rail, 38... Support, 39... Upper cradle, 40... Lower cradle, 42... Guide roll, 44
...Roll, 46...Endless belt, 48...Wheel, 50
... Mechanical drive device, 52 ... Elevator, 54 ... Molded product.

Claims (1)

[Scope of Claims] 1. In an injection molding machine having a vertical mold clamping device in which two or more movable molds advance and retreat in the vertical direction relative to a lower fixed mold to open the mold, a single product receiving The stand is configured to automatically move alternately between the mold clamping devices according to the molding cycle and to come between the movable mold and the fixed mold when the respective mold clamping devices open the mold, and further An automatic product take-out device for an injection molding machine, characterized in that a product conveyor is disposed corresponding to the product pedestal. 2. In the automatic product take-out device for an injection molding machine as set forth in claim 1, a plurality of mold clamping devices are provided in correspondence with the injection devices, and a movable pedestal is extended in parallel with these mold clamping devices. , disposing a product holder on the movable stand so as to be movable and movable between the movable mold and the fixed mold when the mold clamping device opens the mold;
Furthermore, an automatic product take-out device for an injection molding machine comprises an end of a product conveyor facing the end of a movable frame. 3. In the automatic product take-out device for an injection molding machine as set forth in claim 1, the product pedestal is interposed between an upper pedestal, a lower pedestal, and both upper and lower pedestals, so that the upper pedestal is clamped. It consists of a guide roll that is moved between the movable mold and the fixed mold when the mold is opened in the device.
The upper pedestal is configured in a conveyor type with a belt stretched across a plurality of rolls and is connected to a drive device, while the lower pedestal has moving wheels attached to the lower part, and this lower pedestal is connected to the drive device and a braking mechanism. An automatic product take-out device for an injection molding machine. 4. The automatic product take-out device for an injection molding machine as set forth in claim 3, which comprises pasting felt, fuzzy cloth, or artificial turf on the belt surface of the upper pedestal. . 5. An automatic product take-out device for an injection molding machine as set forth in claim 1, which comprises an elevating device provided below a product pedestal.