JPH0343962B2 - - Google Patents

Description

Detailed Description of the Invention Object of the Invention [Industrial Field of Application] The present invention relates to a plurality of cylindrical molded products that are made of a rubber-like elastic body such as various rubbers or soft plastics and that are open at both ends and have undercut portions. The invention relates to a device for taking out cores from a plurality of core molds at once.

[Prior Art] Conventionally, it has been difficult to release a cylindrical molded product, which is made of rubber-like elastic bodies such as various rubbers or soft plastics and is open at both ends and has undercuts, from the core using a machine. It was hot. Therefore, in general, demolding and removal is performed manually using a jig. However, this manual work not only requires skill, but also takes time and is inefficient, resulting in high costs.

In recent years, in order to solve the above-mentioned problems, a method of mechanically releasing the molded product from the mold has been considered. However, this method has only been used for single-piece production, and has not led to complete labor savings and increased productivity.

[Problems to be Solved by the Invention] The present invention achieves full automation of equipment by removing a plurality of cylindrical molded products having the undercut portions from the molds at once by a machine rather than by hand. The aim is to save labor and increase productivity.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a cylindrical molded product made of a rubber-like elastic body such as various rubbers or soft plastics and having an undercut portion and openings at both ends. In the apparatus for removing the plurality of molded products from a plurality of core molds for molding a plurality of molds, a plurality of take-out members are provided on the molded product removal side at positions facing each of the plurality of core molds. The ejecting member is attached to a support member that moves forward and backward with respect to the core mold, and the ejecting member is
an air nozzle whose tip is inserted between the core mold and an opening at one end of the cylindrical molded product when the support member moves forward; and an air nozzle whose tip is opened and closed by an air cylinder and is connected to the air nozzle when closed and a chuck for holding one end of the molded product therebetween, and each of the air nozzles is connected to one of a plurality of independent air tanks.

[Function] By adopting the above configuration, in the present application, a plurality of cylindrical molded products having undercut portions can be separated from a plurality of core dies at once by a plurality of take-out members corresponding to the plurality of core dies. Can be removed from the mold.

[Example] Next, the present invention was applied to an injection molding die 30 to 8 for a boot molded product 31 for a CVJ (constant velocity) joint of an automobile.
An embodiment of an apparatus for simultaneously releasing molds will be described with reference to FIGS. 1 to 5.

The device of the present invention consists of eight take-out machines as take-out members, and as shown in FIGS. 2 and 3, each take-out machine mainly consists of a fixed plate 1, a chuck 2a,
2b, a first air cylinder 3, and an air nozzle 4.

The CVJ (constant velocity) joint boot molded product 31 take-out side of the fixed plate 1 has a diameter slightly larger than the end of the core mold 6 on the molded product take-out side, and can be inserted into the end of the core mold 6. A cylindrical air nozzle 4 is attached. The air nozzle 4 has an outer circumference tapered toward the tip. The rear ends of the air nozzles 4 are connected via hoses 8 to respective air tanks 5 attached to a base 26, which will be described later. On the outer periphery of the air nozzle 4 provided on the fixed plate 1, chucks 2a and 2b are provided on the upper and lower sides as holding members, respectively, and the insertion holes provided at one end of both chucks 2a and 2b are overlapped with each other. , a rotatable shaft 10 on the fixed plate 1
It is worn. In addition, a chuck pawl 11 is attached to the tip of the molded product removal side of the chucks 2a and 2b, and by closing the chucks 2a and 2b, the air nozzle 4 and the chuck pawl 11 are closed. The boot molded product 31 can be held therebetween.

Links 12a and 12b are rotatably attached to ends of the chucks 2a and 2b opposite to the molded product removal side, respectively. Also, both links 12a,
The base ends of the fixing plates 12b are overlapped with each other and the fixing plates 1
a piston rod 1 extending from a first air cylinder 3 attached to the end opposite to the air nozzle 4;
The shaft 13 is rotatably mounted on the shaft 13 relative to the shaft 4.

The take-out machines configured as described above are arranged in two rows and four rows and are attached to support members 21, which will be described later.

The support member 21 has four link arms 22.
A, 22b, 22c, and 22d are attached to the fixing member 23 via a telescopic device formed by pivoting them in a pantograph shape. The same link arms 22a, 22b,
The link arms 22c and 22d include a pair of link arms 22a and 22b whose base ends are rotatably attached to the fixed member 23, and whose intermediate portions are rotatably attached to each other, and the link arms 22.
a and 22b, respectively, and the second shaft is rotatably attached at the intermediate portion.
A support member 21 is pivotally supported above and below the tips of the link arms 22c and 22d, thereby configuring a pantograph type telescoping device. A piston rod 25 of the second air cylinder 24 is connected to one of the link arms 22a by a shaft, so that the support member 21 moves forward and backward with respect to the core mold 6 as the piston rod 25 moves in and out. It's summery.

The fixing member 23 is fixed to a base 26, and wheels 27 are provided at the front and rear of the base 26, and rails 28 are provided.
By moving along the injection mold 3
This injection molding metal fitting 30 is provided with eight core molds 6 corresponding to the take-out machines.

The case of using the take-out device configured as above will be explained.

First, the cavity in the injection mold 30 is filled with material to form the boot molded product 31. Then, the mold is opened to remove the mold. At this time, the boot molded product 31 is attached to the core mold 6, and the boot molded product 31 cannot be released from the mold simply by opening the mold.

Next, the ejecting device is moved along the rail 28 to a position where the core mold 6 and each of the ejecting devices face each other, and is fixed with the positioning pins 32.

As shown in FIG. 4, the first air cylinder 3 is operated to open the upper and lower chucks 2a and 2b. Then, by operating the second air cylinder 24 and pushing out the link arm 22a, the support member 21 is advanced, and the air nozzle 4 of the take-out machine is inserted between the core mold 6 and the end of the boot molded product 31. Insert into. At this time, the first air cylinder 3 is activated to close the upper and lower chucks 2a, 2b, so that the chuck pawl 11 and the air nozzle 4 clamp the open end of the boot molded product 31.

In this state, while blowing compressed air from the air nozzle 4 between the boot molded product 31 and the core mold 6, the second air cylinder 24 is operated to move the take-out machine backward. Then, as shown in FIG.
1 and the air nozzle 4 while being pulled. Moreover, the space between the boot molded product 31 and the core mold 6 is filled with the air, and the entire boot molded product 31 expands, thereby almost eliminating an undercut portion. When the boot molded product 31 is pulled, it is torn off at a predetermined open end on the opposite side of the boot molded product 31 and removed from the core mold 6.

For blowing compressed air from the air nozzle 4, simply attach as many hoses as the number of products from one air source, and connect each hose to the nozzle 4.
Since it was not possible to release and take out multiple products at once due to variations in the amount of air with an air circuit that was simply connected to the
An independent air circuit is created for each product, and air is temporarily stored in the air tank 5 from the air source, and by adjusting the solenoid valve 33, the air is released evenly from each air nozzle 4 and separated from the core mold 6. It is molded so that multiple products can be taken out at once.

Then, by operating the first air cylinder 3 again, the chucks 2a and 2b are opened, and the boot molded product 31 is dropped onto a discharge conveyor 32 (the mounting method is not shown) and sent to the next process.

According to this embodiment, a plurality of boot molded products 31 can be removed from the mold at the same time as the mold is opened, so that removal from the mold can be performed in a much shorter time than the conventional manual removal work. Furthermore, the number of workers in the above process can be reduced, making it possible to save labor, which not only increases productivity but also leads to a reduction in product costs.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can also be embodied as follows.

The number of take-out machines can be changed within a range that can reduce production costs, and may be, for example, 4-piece, 12-piece, or other multiple-pieces.

The take-out machine of the above embodiment is provided with another cylinder 36 shown in FIGS. 6 and 7, and a discharge member 37 that slides along the outer periphery of the air nozzle 4 by the cylinder 36 is provided. This allows the boot molded product 31 to be taken out more smoothly.

The molded product is not limited to the boot molded product 31, but the device of the present invention can be used in any product having an undercut, such as a hose or a dust cover.

[Effects of the Invention] As described in detail above, the present invention achieves full automation of equipment by removing a plurality of cylindrical molded products having undercut portions from the molds at once by a machine without manual work. This has the excellent effect of saving labor and increasing productivity.

[Brief explanation of drawings]

Fig. 1 is a side view of the take-out device of the present invention, Fig. 2 is a side view of the take-out machine of the present invention, Fig. 3 is a front view of the main part of Fig. 2, and Fig. 4 is a use of the take-out machine of the present invention. 5 is a side view of FIG. 4 when the mold is released, FIG. 6 is a side view of another example, FIG. 7 is a front view of FIG. 6, and FIG. 8 is a side view of the air conditioner of the present invention. Air supply circuit to the nozzle. Core mold...6, Support member...21, Chuck...
...2a, 2b, air nozzle...4, air tank...5.

Claims (1)

[Scope of Claims] 1. From a plurality of core molds 6 for molding a plurality of cylindrical molded products having an undercut portion and open at both ends, the plurality of cylindrical molded products are molded from a rubber-like elastic body such as various rubbers or soft plastics. In this device, a plurality of take-out members are provided at positions facing each of the plurality of core molds 6 on the molded product take-out side, and the take-out members are arranged in positions opposite to the core molds 6. The ejecting member is attached to the supporting member 21 that moves forward and backward, and the ejecting member is a holding member whose tip is inserted between the core mold 6 and an opening at one end of the cylindrical molded product when the supporting member 21 moves forward. an air nozzle 4 as a
The air nozzle 4 has chucks 2a and 2b whose tips are opened and closed by an air cylinder 3 and clamp one end of the molded product between the air nozzle 4 and the air nozzle 4 when closed.
A device for taking out cylindrical rubber products, each of which is connected to one of a plurality of independent air tanks 5. 2 The support member 21 includes link arms 22a,
A device for taking out a cylindrical rubber product according to claim 1, characterized in that the device moves forward and backward with respect to the core mold 6 by means of a telescoping device formed by pivoting 22b, 22c, and 22d in a pantograph shape. . 3. The cylindrical rubber product take-out device according to claim 1, wherein eight of the take-out devices are attached to the support member 21.