JPH0157650B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching and removing inserts to a molding machine, and more specifically, inserts that are split molds and are connected to each other when being attached to and detached from a molding machine. This invention relates to a device for attaching and detaching a nest to a molding machine.

In recent years, with the diversification of the uses of molded products and the reduction in the amount of molded product inventory, there has been a need for high-variety, low-volume production. The aim is to reduce mold costs, reduce mold costs, and make more efficient use of mold stock space by downsizing the mold.

However, since the inputs are exchanged very frequently, it is desirable to perform the exchange automatically.

The present invention is a split mold insert, and when the insert is attached to and removed from a molding machine, the inserts are connected to each other.
This was done by focusing on the fact that one of the inserts is always exposed from the mold body, and the aim is to make it easy to process the insert for handling and to transport the insert. To provide a device for attaching and removing an insert to a molding machine that can securely hold the insert without falling when inserting the insert into the molding machine. These are inserts that are connected to each other, and when installing, one insert is inserted and fixed into the insert insertion recess of the mold body, and then
The other insert is inserted and fixed into the insert insertion recess of the other mold body and the connection is released, and when removing, after connecting both inserts, the fixation of the other insert is released, and the A handling hole is drilled in at least one side of both sides of the other insert, of which the fixation of one of the inserts is released, and the both sides of the other insert are provided. An engaging protrusion that engages with the handling hole is protrudingly provided on the insert-opposed surface of the hand portion that sandwich the surface, and the hand portion is placed between the mold fixing position of the molding machine and a predetermined position outside the molding machine. A moving device is provided to move the vehicle.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a plan view showing the parting surface of one of the split molds, and the other mold is constructed in the same manner.

1 is a mold body, and 1a is a guide bar. A substantially square recess 1b is formed in the parting surface of the mold body 1, into which a insert to be described later is inserted. Also, of the inner walls of this recessed portion 1b, the lower inner wall in FIG. 1 has been removed and is open downward. Incidentally, among the inner walls of the recess 1b, the upper inner wall 1c and the left inner wall 1d serve as reference surfaces when fixing the insert.

Reference numeral 2 denotes a nest, which is formed into a substantially square shape that is slightly smaller than the recess 1b, and has a cutout at the lower right corner of FIG. 1 to press the insert 2 against the reference surface of the recess 1b. A pressing surface 2a is formed for this purpose. Further, this pressing surface 2a is an inclined surface that spreads outward from the parting surface toward the bottom surface, and prevents the insert 2 from lifting off from the parting surface when pressing this pressing surface 2a.

Note that this pressing surface 2a is preferably formed so that the bisectors of the interior angle formed by the reference surface are perpendicular to each other, but this is not necessarily the case. It is fine as long as it is on the same side.

A temperature control circuit 2b, which is a flow path for a heat medium, is formed inside the insert 2, and a heat medium is supplied to and discharged from the temperature control circuit 2b on the lower side of the insert 2 in FIG. A connecting tool 2c is provided to protrude.

Reference numeral 3 denotes a fixture for pressing and fixing the insert 2 into the recess 1b, and a hydraulic cylinder 3a attached to the mold body 1 causes the opening of the mold body 1 to be directed toward the insert 2. You can freely advance and retreat. On the surface of the fixture 3 facing the insert 2, a pressing portion 3b is located corresponding to the pressing surface 2a and comes into contact with the pressing surface 2a.
A connector 3c for connecting an external temperature controller or the like (not shown) is provided at a position corresponding to the connector 2c.

4 is a heat insulating layer made of asbestos, etc.;
As shown in the figure, it is provided in each mold body 1 of the split mold. This heat insulating layer 4 is formed on the mold body 1 by a block 4b fixed to the mold body 1 with bolts 4a so that the insert 2 does not come into direct contact with it. Note that the recess 1b is formed by the inner wall surface of the block 4b.

Then, the fixture 3 is moved back downwards,
Insert the insert 2 into the recess 1b so that its pressing surface 2a is at the lower right position, and then insert the hydraulic cylinder 3 into the recess 1b.
When the fixture 3 is raised by a, the pressing part 3b of the fixture 3 presses the pressing surface 2a of the insert 2, presses and fixes the insert 2 to the upper left corner of the recess 1b,
The fixture 3 and the connectors 3c and 2c of the insert 2 are connected, and the heat medium circulates in the temperature control circuit 2b, so that only the insert 2 is temperature-controlled.

When the insert, which is now extremely easy to fix, is removed from the mold body and stored or for preliminary temperature control, it is recommended to connect the movable insert and the fixed insert to each other. suitable.

3 and 4 show the mechanism for connecting the movable side insert and the fixed side insert, and explain this. 10 is the movable side insert, 11 is the fixed side insert, and they are as follows. A temperature control circuit is disposed inside, and connecting portions 10a and 11a for connecting a heat medium circuit such as a temperature control device are provided protruding from the lower side of each of them. Further, pressing surfaces 10b and 11b are provided on the side wall surfaces of the movable side insert 10 and the fixed side insert 11 for pressing and fixing each insert to a predetermined corner of the insert insertion recess formed in the respective mold bodies. is formed.

Reference numeral 12 designates a guide pin, whose base end is fixed to the stationary side insert 11 and whose tip protrudes from the parting surface, and which is inserted into the guide hole 10c drilled in the movable side insert 10 during mold clamping, and is inserted into both inserts. Guide the child to keep its relative position constant.

The pressing surface 10b of this guide pin 12
A narrow diameter portion 12b is formed in the middle of the circumferential surface of the guide pin 12a located nearby.

Reference numeral 13 denotes a plate-shaped stopper, which is positioned corresponding to the narrow diameter portion 12b during mold clamping by inserting the guide pin 12a through a through hole 13a bored with an inner diameter slightly larger than the outer diameter of the guide pin 12a. protrudes from the pressing surface 10b, and its base end is biased by a compression spring 14 in the direction of projection from the pressing surface 10b, and is disposed on the movable insert 10. Note that when the tip of the stopper 13 is pressed against the bias of the compression spring 14 to the same level as the pressing surface 10b, the center of the through hole 13a coincides with the axis of the guide pin 12a, and the guide pin 12a The stopper 13 can be inserted freely.

Therefore, in order to attach both inserts connected by the stopper 13 and the guide pin 12a to the mold body, first insert the stationary insert 11 into the insert insertion recess of the stationary mold body. , the fixing tool 3 is raised from below to fix both inserts to the stationary mold body. When the movable mold body is moved to the mold clamping position, the movable insert 10 is positioned in the insert insertion recess of the movable mold body. If the movable side insert is then fixed by pressing the pressing surface 10b with the pressing part 3b of the fixture 3 by raising the fixture 3, the pressing part 3b will push the stopper 13 at the same time, and both inserts will be fixed. The child is uncoupled. In addition, in order to remove both inserts from the mold body, the operations may be performed in the reverse order as described above.

Next, Figures 5 and 6 show a mold in which both inserts connected as described above are automatically removed from or attached to the mold body. To explain, reference numeral 15 denotes handling holes drilled at two locations in the vertical direction on both vertical wall surfaces of the movable side insert 10.
This handling hole 15 is provided in the insert on which the stopper 13 is disposed, and as mentioned above, the insert on which the stopper 13 is disposed is used for attachment to the mold body. This is suitable because it is exposed from the other mold body during the process.

Reference numeral 16 denotes an arm of the mold changing robot, which includes a hand portion 16a that advances and retreats toward both vertical walls of the movable side insert 10, and an engagement member that protrudes from the inner surface of the hand portion 16a and fits into the handling hole 15. It consists of a protrusion 16b.

Then, the mold changing robot moves the arm 16 between the mold mounting position of the molding machine and the mold stocker outside the molding machine, and both inserts are removed and attached to the molding machine. It happens.

Note that the handling hole 15 and the engagement protrusion 16b in the above-described embodiment may be provided only on at least one wall surface, and the number and shape thereof are not limited to the illustrated example. Furthermore, the handling hole 15 is not limited to the movable insert, but is essentially provided in the insert that is exposed from the mold body when it is attached to and removed from the mold body.

In this manner, according to the present invention, processing for handling the insert is simple, as it is only necessary to provide a hole in the side wall surface of the insert, and moreover, the insert can be reliably gripped and transported without falling. It has a remarkable effect.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the parting surface of the molding die according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A, and FIG. 3 is a rear view showing a state in which both split inserts are connected. Figure 4 is a sectional view taken along line B-B, Figure 5 is a side view of the insert with handling holes for lifting both connected inserts, and Figure 6 is a line C-C in Figure 5.
FIG. 3 is a cross-sectional view and a plan view of the handling arm. 1... Mold body, 1a... Guide bar, 1b... Recess, 1c... Upper inner wall, 1d... Left inner wall, 2... Insert, 2a... Pressing surface, 2b... Temperature control circuit, 2c... Connection tool, 3... Fixing tool , 3a... Hydraulic cylinder, 3b... Pressing part, 3c... Connector, 4... Heat insulation layer, 4a... Bolt, 4b... Block, 10... Movable side insert, 10a
...Connection part, 10b...Press surface, 10c...Guide hole,
DESCRIPTION OF SYMBOLS 11... Fixed side insert, 11a... Connection part, 11b... Pressing surface, 12, 12a... Guide pin, 12b... Small diameter part, 13... Stopper, 13a... Through hole, 14... Compression spring, 15... Handling hole, 16...Arm,
16a...hand portion, 16b...engaging protrusion.

Claims (1)

[Claims] 1 The inserts are split molds and are connected to each other when they are attached to and removed from the molding machine.When installing, one insert is inserted and fixed into the insert insertion recess of the mold body, and then the other insert is inserted and fixed. insert and fix the insert into the insert insertion recess of the other mold body and release the connection, and when removing, connect both inserts and then release the fixation of the other insert, and A handling hole is drilled in at least one side of both sides of the other insert, of which the fixation of one of the inserts is released, and the both sides of the other insert are provided. An engaging protrusion that engages with the handling hole is protrudingly provided on the insert-opposed surface of the hand portion that sandwich the surface, and the hand portion is placed between the mold fixing position of the molding machine and a predetermined position outside the molding machine. A device for inserting and removing inserts into a molding machine, which is equipped with a moving device that moves by a distance.