JPH0780218B2 - Shutoff valve device for product transfer path in continuous injection molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutoff valve device for a product transfer path in an injection molding machine for simultaneously molding a large number of small products continuously.

[0002]

2. Description of the Related Art Conventionally, in this type of apparatus, a product collection box (stocker) is detachably provided, and the transfer path from the exit of the molding die of the injection molding machine to the product collection box is completely sealed. I was making up.

[0003]

However, in the above-mentioned conventional example, it is necessary to check the finished state of the product collected in the product collection box during the collection or to replace the collection box due to other reasons such as fullness. When it occurs, all the transfer paths are configured to be airtight, so that the molding operation must be stopped and processed according to the respective purpose each time. Further, in the above-mentioned conventional example, it was difficult to perform molding operation in a clean room at a constant temperature and in a dustproof state by remote control.

[0004]

In a shutoff valve device provided on the way of a product transfer path from a molding die outlet of an injection molding machine to a product recovery box, a shutoff valve device is provided on a delivery side of a valve device body. An opening / closing valve that opens on the product recovery box side is provided, and an intake port for sucking air in the product transfer path from the opening / closing valve to the molding die outlet is provided on the primary side of the opening / closing valve, and compressed air. And a blow-in port of the shield valve device.

[0005]

The product molded by the molding die is drawn into the shutoff valve device by sucking the air in the product transfer passage from the intake port in the valve body. During that time, compressed air is sent from the blow-in port that was in a resting state to increase the internal pressure of the shut-off valve device and open the on-off valve, and at the same time, the product held in the valve device is passed through the on-off valve part and the product collection box. The air is sent out by wind pressure into the inside of the collection box, and at the next moment, the air supply from the inlet is stopped, and the product molded during that time is again sent into the shutoff valve device by the same operation as described above. Be done.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the embodiments shown in the drawings. Each of the shutoff valve devices B ₁ , B ₂ , B _{3 of the} present invention will be described below.
1 are configured as shown in FIGS. 1 and 2, and both are the same. Therefore, referring to FIG. 1, a partition plate 6 (see FIG. 2) is inserted into an opening 5 formed in one side of the valve device body 4. transfer tube 3 _1, 3 ₂ as the passage of the products Te, ..., connected to the distal end of the 3 _n, the transfer tube 3 _1, 3 _2, ..., die 1 of 3 _n the injection molding machine a and the other end to be described later A mouthpiece 9 for connecting a transfer pipe is attached to an outlet 7 formed on the other side of the valve device body 4 via an opening / closing valve 8 that opens outward (toward the collection box). 9 are transfer pipes 10 ₁ , 10 leading to product recovery boxes C ₁ , C ₂ , ..., C _n.
2 , ..., 10 _n are connected respectively. Further, an intake port 11 for removing the air in the transfer pipes 3 ₁ , 3 ₂ , ..., 3 _n is formed on one side surface of the valve device main body 4, and the intake pipe 12 is provided in the intake port 11.
_1, 12 _2, ..., and connected to a suction pump through a 12 _n (not shown), transfer tube 3 _1, 3 _2, ..., as well as to be sucked into intermittent air within 3 _n, the valve A blow-in port 1 is provided on the other side of the device body 4.
3 is provided, and in the connecting portion 14 provided on the outside of the valve device body 4, the air supply pipes 15 ₁ , 15 leading to an air supply pump (not shown) that intermittently supplies air like the suction pump. ₂ , ..., 15 _n
It will be connected. The other end of each of the transfer pipes 3 ₁ , 3 ₂ , ..., 3 _n is connected to a die 1 of an injection molding machine A via a multi-nozzle 2 for jetting air, and a plurality of multi-nozzles 2 are provided in the multi-nozzle 2. Each of the molded products formed by the die 1 for extrusion is extruded, and the transfer pipes 3 ₁ , 3 ₂ , ..., 3 _n connected to the multi-nozzle 2 are shielded respectively. Product recovery boxes C ₁ , C ₂ , C ₃ , via the valve devices B ₁ , B ₂ , B ₃ , ..., B _n .
, C _n are connected so that the same product is simultaneously sent out into each product collection box. In the figure, reference numeral 16 indicates an outdoor operation panel, and 17 indicates a clean room.

[0007] Next will be described a series operation of the above configuration, first intake pipes _{12 1, 12 2, ...,} 12 n is the injection molding machine A
Intermittently (10 to 30
Is controlled so that the suction operation is performed at every (second interval), that is, every time the product is molded, the suction pipe 11 is sucked into the suction pipes 12 ₁ , 12 ₂ ,
, 12 _n and 12 to reduce the pressure in the transfer pipes 3 ₁ , 3 ₂ , ..., 3 _n , and at the same time, send compressed air for pushing out the product from the air supply pipe 2 ′ to the multi-nozzle 2, Transfer pipe 3 ₁ , 3
_2, ..., 3 shutoff valve device via the _n B _1, B _2, ..., it is fed from the opening 5 of the B _n to the valve device body 4. That is, the transfer pipe 3 ₁ , by the air sent from the air supply pipe 2 ′ and the air sucked from the intake port 11 (the suction is made stronger than the air supply pressure).
An air flow from the multi-nozzle 2 to the intake port 11 is formed in 3 ₂ , ..., 3 _n , and as a result, the internal pressure of the valve device body 4 does not increase, so that the on-off valve 8 is kept in the closed state, and during that time,
Since the air is not fed into the air supply pipes 15 ₁ , 15 ₂ , ..., 15 _n , the molded product a pushes the partition wall plate 6 from the slits 6a, 6a, ... Mouth 11
Is designed to be smaller than the outer shape of the molded product a (replacement is free)
Stays in the valve device body 4 because it is
When the suction operation from 1 is stopped, the air pipes 15 ₁ , 15
_The compressed air is instantaneously sent into the valve device main body 4 from the blow-in port 13 through ₂ , ..., 15 _n , so that the partition plate 6 prevents the air from entirely escaping into the transfer pipe 3 ₁ . The internal pressure of the valve device body 4 increases and the on-off valve 8 is pushed open in a chain line state. At the same time, the air flow at that time causes the molded product a to pass through the transfer pipes 10 ₁ , 10 ₂ , ..., 10 _n and the product collection boxes C ₁ , C ₂ ,
..., sent into C _n . At the same time, the air pipe 1
The supply of compressed air from 5, 15 ₁ , 15 ₂ , ..., 15 _n is stopped until the next molded product reaches the inside of the valve device body 4.

In this way, since the intake operation from the intake port 11 and the injection operation from the injection port 13 are in opposite phases to each other and are intermittently performed, the product a is introduced into the valve device body 4. Transfer pipes 10 ₁ , 10 ₂ , ..., 1 during the guiding operation period
Since 0 _n is shut off by the opening / closing body 8 under the same conditions as the outside air, the product collection boxes C ₁ , C ₂ , ..., C _n can be freely inserted and removed, and therefore, when the product is full, it is collected. When replacing the box or checking the finished state of the product in the collection box, the collection box can be easily removed by adjusting the operation timing without stopping the operation of the injection molding machine. Further, the product can be processed by remote control, and a substantially complete clean room state can be realized.

[0009]

EFFECTS OF THE INVENTION Since the shielding valve device is interposed in the transfer path from the take-out side of the injection molding machine to the product collection box, the product collection box can be freely replaced and maintained without stopping the injection molding machine. It is possible to manage products without affecting production.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional side view of a main part of a shutoff valve device of the present invention.

FIG. 2 is a plan view of a partition plate used in the same apparatus.

FIG. 3 is a simplified side view of a partial vertical section showing an example of use of the shutoff valve device.

[Explanation of symbols]

1 Molding die 2 Multi-nozzle 3 ₁ , 3 ₂ , ..., 3 _n Transfer pipe 4 Valve device body 5 Opening 6 Partition plate 7 Discharge port 8 Open / close valve 10 Transfer pipe 11 Intake port 12 ₁ , 12 ₂ , ..., 12 _n Intake air Pipe 13 Outlet port 15 ₁ , 15 ₂ , ..., 15 _n Air pipe

Claims (1)

[Claims] 1. A shutoff valve device provided in the middle of a product transfer path from an outlet of a molding die to a product recovery box in an injection molding machine, wherein an on-off valve is provided on a delivery side of a valve device body constituting the shutoff valve device. An intake port for exhausting air in the transfer path from the on-off valve to the outlet of the molding die on the primary side of the on-off valve, and a blow-in port for introducing compressed air into the valve device body. A shutoff valve device for a product transfer path in a continuous injection molding machine, characterized by being provided with.