JP3025621B2 - Equipment for sorting hollow molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow molding machine, and more particularly to a sorting apparatus for sorting non-defective products and non-defective hollow molded products formed by a small-sized hollow molding machine.

[0002]

2. Description of the Related Art A conventional small-sized blow molding machine generally employs the structure shown in FIG. That is, FIG. 2 shows a schematic front view of a small-sized electric blow molding machine, and in FIG.
On a lower frame 1a of the frame 1, a mold transfer device 2 is provided.
Are arranged. The mold moving device 2 includes a lower frame 1a.
A ball screw 2b provided above via a bearing bracket 2a, an electric motor 2d for driving the ball screw 2b,
A ball nut 2c screwed into the ball screw 2b;
Moving table 2e integrally connected to ball nut 2c
It is composed of An air blowing device 3 is provided on the upper frame 1b which is integrally planted on the lower frame 1a.
Is provided, and an air blowing nozzle 3a is provided at a lower portion. An extruder 4 is disposed on the left side of the air blowing device 3 in the drawing, and a parison 6 hanging from a crosshead 5 connected to the tip of the extruder 4 is a metal mold that is opened and closed by a mold clamping device 8. It is held in the mold 9. The mold 9
Is attached to the mold clamping device 8 via the mold attachment plate 8a.

The mold clamping device 8 is connected to a moving table 2e integrated with the ball nut 2c, and rotates the ball screw 2b by the electric motor 2d to thereby move the air blowing position A along the direction of arrow C. And parison receiving position B
It goes back and forth between.

In the upper frame 1b on the right side of the air blowing device 3 in the figure, a molded product inspection machine 10 is provided, and a molded product holding device 11 attached to a mold mounting plate 8a of a mold clamping device 8 is provided. They are opposed to each other. This holding device 11
Below the belt conveyor 1 that conveys the molded product out of the machine
2 are provided. At the side of the belt conveyor 12, a defective product sorting device 1 including a defective product collection shooter 13 is provided.
4 are provided. A receiving box 15 for non-defective products 17 is provided below the downstream end of the belt conveyor 12, and further below the belt conveyor 12 and the mold clamping device 8.
Belt conveyor 1 for collecting defective products 18 and burrs
6 are provided.

Next, the sorting device 14 will be described in detail. FIG. 3 is an enlarged configuration diagram of the molded product sorting device 14 as viewed from the direction of arrow D in FIG.

On the left side of the belt conveyor 12 in the drawing, a spray nozzle 20 for compressed air is attached by a nozzle attachment 21. The spray nozzle 20 is provided with the regulating valve 2
2 and a compressed air source (not shown) via the solenoid valve 23
Is connected to On the right side of the belt conveyor 12 in the drawing, a defective product recovery shooter 13 having a U-shaped cross section is provided fixed to the upper frame 1b so as to face the spray nozzle 20.
The defective product 18 blown off by the compressed air is guided to a belt conveyor 16 provided below.

Next, the operation of the above-mentioned compact blow molding machine will be described. First, the mold 9 is waiting at the air blowing position A with the mold opened by the mold clamping device 8. At this time, the molded product formed in the previous cycle is still supported by the air blowing nozzle 3a. From the crosshead 5 connected to the tip of the extruder 4, a cylindrical parison 6
Is pushed downward by a predetermined length, the electric motor 2d is rotationally driven in the forward direction. Thereby, the ball screw 2b
Is rotated, the ball nut 2c meshing with the ball screw 2b moves forward in the left direction in the figure, and the movable base 2e, the mold clamping device 8, the mold 9, and the mold clamping device integrated with the ball nut 2c. 8, the molded product holding device 11 attached to the right side in the figure also advances at the same time. The mold 9 moves from the air blowing position A to the parison receiving position B along the arrow C direction. Next, the mold clamping device 8 is operated to close the mold, and the parison 5 is held in the mold 9. Subsequently, the parison 6 is cut by the cutter 7. In conjunction with the closing of the mold, the molded product holding device 11 operates to hold the molded product supported by the air blowing nozzle 3a. At the same time, the air blowing nozzle 3a rises.

Next, the electric motor 2d is rotated in the retreating direction, and the mold 9 is moved from the parison receiving position B to the air blowing position A.
Go to Next, the air blowing nozzle 3a of the air blowing device 3 descends and air is blown into the parison 6, whereby a hollow molded product having a predetermined shape is formed. On the other hand, the holding device 11 for the molded product also moves in the retreating direction together with the mold 9 and
It stops below 0 and the molding is inspected. After the molded product is cooled and solidified, the mold is opened by the mold clamping device 8. At this time, the inspection of the molded product in the previous cycle has been completed by the inspection machine 10, and the molded products are sequentially aligned and conveyed by the belt conveyor 12 provided below at the same time when the mold is opened. One cycle ends as described above.

In the inspection machine 10, the nozzle of the inspection machine 10 is pressed against the mouth of the molded product held by the holding device 11 to check whether there is any liquid leakage at the mouth of the molded product, and to check the pin of the body. A hole is inspected, and a signal is issued in the case of a defective product 18.

[0010] The molded products that have been inspected by the inspection machine 10 are sequentially arranged by the belt conveyor 12 and conveyed out of the machine as described above. As shown in FIG.
When the belt comes to the position of the blowing nozzle 20 of the sorting device 14, the belt conveyor 12 is temporarily stopped, and at the same time, the solenoid valve 23 is switched, and compressed air is blown from the blowing nozzle 20 toward the defective product 18. In addition, adjustment of the blowing amount
The adjustment is performed by the regulating valve 22. The defective product 18 is blown off by the compressed air, guided by a defective product recovery shooter 13 provided opposite to the spray nozzle 20, and dropped onto a belt conveyor 16 provided below.
The non-defective product 17 is sent to the downstream end of the belt conveyor 12 and falls into a receiving box 15 provided below. In this manner, the non-defective product 17 and the defective product 18 are sorted out.

[0011]

Since a molded product manufactured by a small hollow molding machine is relatively small, that is, 1 cc to 10 liters, the molded product is inspected by an inspection machine and then sorted out as described in the prior art. In the apparatus, compressed air is blown to defective products on the belt conveyor, and the defective products are blown off and sorted. In addition, since molded products of 10 liters or more produced by a large-sized hollow molding machine are difficult to blow off with compressed air, defective products are manually removed from the belt conveyor. The method of selecting defective products by blowing out defective products with compressed air is used in most small hollow molding machines because the hollow molding machine has a compressed air source used for air blowing equipment and the like and the equipment is inexpensive. I have.

However, if compressed air is blown on the defective product, the molded product may fall on the belt conveyor and proceed on the belt conveyor as it is to enter a good product receiving box. Also, if the pressure of the compressed air is strong or the position of the spray nozzle is bad, the molded product will not enter the defective product collection shooter and will be scattered around the molding machine. Was. In addition, it is difficult to sort by hand in the case of a small-sized blow molding machine, because the production speed is one or two in a few seconds.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to form a molded product by a small hollow molding machine and then continuously form the molded product. It is intended to provide a method and an apparatus for selecting a molded product, in which a non-defective product and a defective product are surely selected according to the inspection result.

[0014]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for sorting hollow molded articles, comprising: an inspection machine for inspecting a molded article formed by a hollow molding machine in the machine; and a molding machine provided below the inspection machine and having been inspected. A transfer device for transferring goods out of the machine, a dispensing plate for ejecting defective products which is operated by a fluid pressure cylinder provided on the side of the transfer device and adjacent to the blow molding machine, and the other side of the transfer device With a defective product collection device
It is composed of

It is preferable that the transfer device is a belt conveyor.

It is preferable that the dispensing plate be stroked over the entire width of the belt conveyor.

[0017] It is preferable that the dispensing plate is capable of adjusting the position in the vertical direction and also adjusting the speed.

Preferably, the surface shape of the dispensing plate is the same as the shape of the body of the molded product, and a member having a large frictional resistance is preferably provided on the surface.

It is preferable to use a belt having a small frictional resistance for the belt conveyor.

[0020]

The molded products that have been inspected by the inspection machine are transported in alignment by the transporting means. When a defective product is sent to the position of the protruding device of the sorting device, the dispensing device attached to the tip of the fluid pressure cylinder of the protruding device discharges the defective product from the transport means. The defective product is guided by a defective product recovery device provided opposite to the fluid pressure cylinder, and falls on a belt conveyor provided below.

[0021]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing an apparatus for sorting hollow molded articles according to the present invention, and is an enlarged view as viewed from the direction of arrow D in FIG.

A projecting device 25 is provided on the left side of the belt conveyor 12 as a conveying device in the drawing.
5 is an air cylinder 25a as a fluid pressure cylinder
And a payout plate 25 as a payout device.
The air cylinder 25a is mounted on a mounting bracket 26, and the mounting bracket 26 is mounted on the upper frame 1b or the like with bolts 27 passing through a long hole 26a extending vertically. A dispensing plate 25b is provided at the tip of the rod of the air cylinder 25a, and is configured to stroke over the entire width of the belt conveyor 12. Note that a belt having a small frictional resistance is used for the belt conveyor 12.

The air cylinder 25a is connected to a compressed air source (not shown) via a regulating valve 28 and a solenoid valve 29. Further, the surface shape of the payout plate 25b may be adjusted to the shape of the body of the molded product, or the payout plate 25b may be used.
By attaching a member having a large frictional resistance such as rubber to the surface of b, defective products can be reliably discharged. On the right side of the belt conveyor 12 in the drawing, a defective product recovery shooter 1 having a U-shaped cross section as a defective product recovery device facing the dispensing plate 25b of the air cylinder 25a.
3 is fixedly provided on the upper frame 1a or the like, and guides defective products discharged by the discharge plate 25b to a belt conveyor 16 as a transport device provided below.

Next, the operation of the sorting device 14 will be described. First, the molded products that have been inspected by the inspection machine 10 are arranged and conveyed by the belt conveyor 12. As shown in FIG. 1, when the defective product 18 is sent to the position of the air cylinder 25a of the sorting device 14, the belt conveyor 12 is temporarily stopped, and at the same time, the solenoid valve 29 is switched, and the tip of the rod of the air cylinder 25a is switched. The dispensing plate 25b of the molded product attached to the projection protrudes toward the defective product 18. Note that the speed of the dispensing plate 25b is controlled by the adjusting valve 2
Adjust with 8. The defective product 18 is discharged from the belt conveyor 12 by the discharge plate 25b, guided by the defective product recovery shooter 13 provided opposite the air cylinder 25a, and dropped onto the belt conveyor 16 provided below. . The non-defective product 17 is sent to the downstream end of the belt conveyor 12 and is provided below.
7 falls into the receiving box 15. In this way, the non-defective product 17 and the defective product 18 are sorted out.

In the above-described embodiment, the fluid pressure cylinder is described as the air cylinder 25a, but may be a hydraulic cylinder.

[0026]

Since the present invention is configured as described above, the following effects can be obtained. (1) Since the dispensing device of the molded product makes a stroke in the entire width direction of the transfer device, it is possible to reliably sort the defective product without remaining on the transfer device and traveling straight as a good product. (2) The position of the dispensing device for molded products can be adjusted up and down, so that the center of gravity of defective products can always be dispensed. As a result, defective products fall over, resulting in poor payout (selection failure),
It can be prevented from mixing with non-defective products. (3) Since the speed of the dispensing plate of the molded product can be adjusted by the adjusting valve, the defective product is repelled by the dispensing plate and scattered outside the defective product collecting shooter. That is, if a defective product falls on a floor or the like, it becomes dirty and cannot be recycled, but the present invention enables complete recycling.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an apparatus for sorting molded articles according to the present invention.

FIG. 2 is an overall configuration diagram of a small blow molding machine.

FIG. 3 is a configuration diagram showing a conventional molded product sorting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Inspection machine 11 Holding device 12, 16 Belt conveyor (conveyance device) 13 Defective product collection shooter (Defective product collection device) 14 Sorting device 15 Receiving box 17 Good product 18 Defective product 20 Spray nozzle 21 Nozzle fixture 22, 28 Adjustment valve 23 , 29 Solenoid valve 25 Projection device 25a Air cylinder (fluid pressure cylinder) 25b Discharge plate (discharge device) 26 Mounting bracket 27 Bolt

Claims (7)

(57) [Claims] 1. An inspection machine (10) for inspecting a molded article molded by a hollow molding machine in the machine, and a transfer device provided below the inspection machine (10) and transporting the inspected molded article to the outside of the machine. (12) and a delivery plate (25) for ejecting a defective product (18) operated by a fluid pressure cylinder (25a) provided on the side of the transfer device (12) and adjacent to the blow molding machine.
b) and a defective product collection device (13) provided on the other side of the transfer device (12). 2. The method according to claim 1, wherein the conveying device is a belt conveyor.
The apparatus according to claim 1, wherein the payout plate (25b) strokes over the entire width of the belt conveyor (12). 3. The dispensing plate (25b) is vertically adjustable in position.
Or the apparatus for sorting hollow molded articles according to 2. 4. The apparatus according to claim 1, wherein the payout plate (25b) is adjustable in speed. 5. The sorting of hollow molded products according to claim 1, wherein the surface shape of the payout plate (25b) is the same as the shape of the body of the molded product. apparatus. 6. The apparatus according to claim 1, wherein a member having a large frictional resistance is provided on a surface of the dispensing plate (25b). 7. The apparatus according to claim 2, wherein a belt having low frictional resistance is used for the belt conveyor.