JPH042017Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an injection molded product sorting device that automatically changes the collection path of molded products according to the distinction between good and defective injection molded products. .

(Prior art) Many injection molding machines are equipped with a computer-based monitoring and alarm system, and all monitoring conditions are input into this monitoring and alarm system.
If the actual value deviates from these monitoring conditions, a warning is issued for each monitoring item.

By the way, in many injection molding machines, after molding, the mold is opened and the molded product is automatically taken out by a product take-out device. Dropped onto the computer.

The shooter has a first passage through which non-defective products fall and a second passage through which defective products fall, and a non-defective product collection section is connected to the first passage, and a defective product collection section is connected to the second passage.

Therefore, if the molded product is good, it will be placed in the first passage.
In the case of defective products, it is necessary to drop them into the second passage, and this distinction is made based on a signal from the monitoring and alarm device.

In other words, if the monitoring alarm device issues an alarm,
The product take-out device is configured to drop the molded product into the second path, and if an alarm is not issued, the molded product is caused to fall into the first path.

(Problem that the invention aims to solve) Molded products usually have residual resin attached to the runners of the mold (hereinafter referred to as the runner part), and after being removed from the mold, the runner parts are attached to the molded product. separated from This runner part is attached to the molded product regardless of its quality.

Furthermore, when changing the color of the raw resin, it cannot be used as a product at first because the color of the resin from the previous cycle is mixed.

However, in the above conventional example, there are two types of good products and defective products.
In other words, only two types of products, good and defective, can be sorted out. If the product is good, the runner part attached to it is also dropped into the path of good products, and the molding during color change. If the product satisfies the monitoring conditions, it is dropped into the good product aisle, so it is necessary to manually sort the good products from the runner parts, and the non-defective products from molded products that are in the process of changing color, which is time-consuming. I used to be.

This invention was developed to solve the above problems, and is an injection molding method that can not only distinguish between good and defective products, but also between non-defective products and runner parts, and non-defective products and molded products that are in the process of changing color. The purpose is to obtain a product sorting device.

(Means for Solving the Problems) The present invention includes a first path through which non-defective products fall by arranging a plurality of partition plates in parallel to each other on a sliding plate connected to a drop opening through which molded products fall; A second passage where the runner part falls, and a third passage where the molded product and runner part fall when replacing the raw resin.
A partition plate is rotatably supported to form a passage and partition the passages adjacent to each other, and the partition plate is positioned parallel to the passage under molding conditions in which non-defective products are molded, and is located parallel to the passage when defective products are molded. Under molding conditions, it rotates in the direction of closing the first passage to take a position where the first and second passages merge, and further rotates in the direction of closing the first and second passages when replacing the raw resin. Then, the first, second and third passages are located at a position where they merge.

(Function) If the actual value satisfies the monitoring conditions, the molded product is a good product, and the good product is dropped into the first passage, and the runner section separated from the non-defective product is dropped into the second passage, and at this time, the partition Since the board is located parallel to the passage, the good products and the runner section slide along the respective passages and are collected.

Next, if the actual value does not satisfy the monitoring conditions, the molded product is defective, but the defective product is dropped into the first passage, the runner is dropped into the second passage, and at this time the first and second passages are dropped. The partition plate between the second aisles is in a position to close the first aisle by rotating in a direction intersecting with the first aisle, so a defective product that falls into the first aisle will hit the partition plate and then Slide along and join the second passage.

At the time of color change, the molded product is dropped into the first passage and the runner part is dropped into the second passage, and at this time, the partition plate between the first and second passages and the partition plate between the second and third passages are In order to close the first and second passages by rotating in the direction intersecting the first and second passages, the molded product and the runner part hit the partition plates that close the respective passages, and then rotate along the partition plates. Slide into the third passage and merge into the third passage.

(Example) Examples of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, 1 is the bed, 2
is the fixed plate fixed on the bed 1, 3 is the fixed plate 2
4 is a tie bar that guides the movable plate 3, and the stationary side mold 5 is on the stationary plate 2.
Furthermore, movable molds 6 are fixed to the movable plate 3, respectively.

A recess 7 is formed in the bed 1 between the fixed mold 5 and the movable mold 6, and a shutter 8 is installed in the recess 7. The shooter 8 includes a sliding plate 9 arranged vertically inclined, and a sliding plate 9.
Four partition plates 10, 11, 12 arranged in parallel on the top,
It has 13.

The partition plates 10, 11, 12, 13 are arranged along the inclination direction of the sliding plate 9, and are arranged parallel to each other at appropriate intervals. 13, three first to third passages 14, 15, and 16 are formed. Among the partition plates 10, 11, 12, and 13, the first partition plate 11 partitions the first passage 14 and the second passage 15.
consists of a fixed plate 11a located on the downstream side and a first rotating plate 11b located on the upstream side, and the side end portion of the first rotating plate 11b on the downstream side is fixed to the first pin 17.

In such a configuration, the second passage 15 and the third passage 1
A second partition plate 12 that partitions the 6 is also adopted. That is, the second partition plate 12 consists of a fixed plate 12a located on the downstream side and a second rotating plate 12b located on the upstream side, and the side end of the second rotating plate 12b on the downstream side is connected to the second pin 18. is fixed.

The lower end portions of the first and second pins 17 and 18 pass through the sliding plate 9 and are connected to the first and second motors 19 and 20, respectively.

The first and second pins 17 and 18 are connected to each motor 19 and 2.
0 rotation, and together with this, the first and second rotating plates 11b and 12b rotate in the direction of closing the first and second passages 14 and 15 within an angle range smaller than 90°. . In this closed state, the first rotating plate 11b is located upstream of the second rotating plate 12b, and the first and second rotating plates 11b and 12b are arranged substantially in a straight line in the first and second passages. A new passage is formed that joins the third passage.

Above the upstream ends of the first and second passages 14 and 15, fall confirmation devices 21 and 22 (not shown) are provided to confirm the fall of molded products and runners.
is installed.

In addition, each of the first, second, and third passages 14,
The downstream ends of 15 and 16 are respectively connected to a good product recovery section 23,
It is connected to a defective product and runner part recovery section 24 and a molded product and runner section recovery section 25 that is undergoing color change.

Reference numeral 26 denotes an air blowing device installed above between the fixed and movable molds 5 and 6, which blows the molded product and runner section taken out from the mold cavity into the shutter 8.
This is to guide you.

27 is a molded product drop port to which the upstream end of the shooter 8 is connected.

Next, the operation of the device having the above configuration will be described.

As mentioned above, if the actual value deviates from the monitoring conditions, the monitoring and alarm device will issue an alarm, but the monitoring conditions here include, for example, the filling time (the time from the start of injection until reaching the secondary pressure switching position). ),
Charge time (time while the screw is rotating), 1 cycle time (time from mold closing to mold closing in the next cycle), cushion amount (screw position at the moment injection ends), raw resin temperature (temperature of resin during injection) ),
Injection holding pressure (secondary and tertiary injection pressure) is typical, but other conditions can be input as appropriate.

Injection is performed continuously under such monitoring conditions, but if the actual value does not deviate from the monitoring conditions during continuous operation, no signal is output from the monitoring alarm device, and the first and second partitions Boards 11, 12
holds the position indicated by the solid line as shown in FIG.

On the other hand, the molded product taken out from the mold cavity falls into the first passage 14 guided by the air flow blown out from the air blowing device 26, and the runner part falls into the second passage 15. After falling, each slides through the first and second passages 14 and 15 and is collected by the non-defective product collection section 23 and the defective product and runner section collection section 24, respectively.

If the actual value deviates from the monitoring conditions during continuous operation, a signal is output from the monitoring and alarm device, the first motor 19 is activated, and the first rotating plate 11b is moved to the first passage 14.
will be closed. As a result, the molded product (defective product) that has fallen into the first passage 14 hits the first rotating plate 11b and is guided by the rotating plate 11b to join the second passage 15. On the other hand, the runner part falls into the second passage 15, but it slides along the second passage 15 as it is.

When the actual value satisfies the monitoring condition from such a state, the first motor 19 is activated and the first rotating plate 11b returns to its original position.

Next, the process of changing the color of the raw resin will be explained.

When changing colors, the first and second motors 19 and 20 are operated to rotate the first and second rotating plates 11b and 12b, and the first and second passages 14 and 1 are rotated as shown in FIG.
Close 5. As a result, the molded product falling into the first passage, which is in the process of color changing, hits the first rotating plate 11b, and the runner part hits the second rotating plate 12b, and then the runner part hits the second rotating plate 12b.
It joins the passage 16 and is collected in a molded product and runner part collection section 25 that is in the process of color changing.

When the color change is completed, the first and second motors 19, 20
is operated, and the first and second rotating plates 11b and 12b return to their original positions.

FIG. 4 shows another embodiment of the present invention, which differs from the first embodiment in that the shutter 8 is reversible as shown in FIG. That is, in the first embodiment, the shooter 8 is always located on the operation side A of the injection molding machine, but in the present embodiment, when the actual value satisfies the monitoring condition,
That is, when collecting non-defective products, the shooter 8 rotates and is positioned on the opposite operation side B.

When the shooter 8 is thus located on the opposite-to-operation side B, non-defective products fall onto the shooter 8 and are collected by the non-defective product recovery section 23. On the other hand, the runner parts separated from the non-defective products are guided by the air flow from the air blowing device 26 and fall directly onto the defective products and runner part collecting section 24 on the operation side A without falling into the shooter 8.

In such a state, if the actual value deviates from the monitoring condition, the shutter 8 is rotated to the operation side A, and the molded product and the runner section are moved to the shutter 8 as in the first embodiment.
fall on top.

A motor 29 for rotating the shooter 8 is a drop confirmation device provided on the non-operating side B.

(Effects of the Invention) As explained above, in the present invention, it is possible not only to sort out good products and defective products, but also to sort out good products and runner parts, so that the labor of sorting work can be saved.

Furthermore, since defective products and runner parts are collected at the same location, the workability of crushing and recycling is improved.

Furthermore, with this invention, molded products that are in the process of changing color are separated from others and collected in a dedicated collection section, eliminating the need to manually separate molded products that are in the process of changing color from defective products and liner parts. , saving you time and effort.

Furthermore, since sorting can be performed automatically as described above, automation using a conveyor becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a front view of the injection molded product sorting device according to the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is an explanatory diagram of the function of the shooter, and Fig. 4 is another embodiment of the present invention. 5 is a front view of FIG. 4, and FIG. 5 is a side view of FIG. 5... Fixed side mold, 6... Movable side mold, {9...
...sliding board, 10, 11, 12, 13...partition board}
(shooter), 14...first passage, 15...second passage, 16...third passage, 26...air blowing device,
27...Drop opening.

Claims (1)

[Scope of Claim for Utility Model Registration] An air blowing device is provided above between the fixed and movable molds to guide the molded product released from the mold cavity and the runner part to a predetermined position, so that the molded product falls. A sliding plate is connected to the drop opening where the molded product falls, and a plurality of partition plates are arranged in parallel to each other on the sliding plate to create a first passage where the molded product falls, a second passage where the runner part falls, and a raw resin exchange. At the third stage, the molded product and runner part fall.
A partition plate is rotatably supported to form a passage and partition the passages adjacent to each other, and the partition plate is positioned parallel to the passage under molding conditions in which non-defective products are molded, and is located parallel to the passage when defective products are molded. Under molding conditions, it rotates in the direction of closing the first passage to take a position where the first and second passages merge, and further rotates in the direction of closing the first and second passages when replacing the raw resin. A sorting device for injection molded products, characterized in that the device is configured to take a position where the first, second and third passages merge.