JPH0741638B2 - Injection molding machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cavity unit having an insert in an injection molding machine or an injection molding machine capable of fully replacing the insert.

[Conventional technology]

Conventionally, the invention described in Japanese Utility Model Publication No. 2-2576 is known as a mold exchange technique for an injection molding machine or the like.

Therefore, the invention described in the publication discloses a carriage that is movable and positioned by a self-propelling means from a direction orthogonal to the mold replacement direction to a predetermined position including a mold replacement position on the front side of a mold mounting portion of a molding machine. Provided on the upper surface of the dolly is a mold exchanging table having two die mounting portions so as to be movable in a direction orthogonal to the die replacement direction by a predetermined length corresponding to one surface of the die mounting portion. , The carriage is provided with position switching drive means for moving the mold exchanging table to selectively switch the mold exchanging sections to switch the mold exchanging sections, and the molds are mounted on the respective die mounting sections. It is a mold exchanging device for a molding machine, which is provided with a transfer means for transferring in a replacement direction.

[Problems to be Solved by the Invention]

In the conventional injection molding machine, when exchanging the mold,
Since the injection molding mold used for molding as an external setup is in the mold storage area, the mold temperature is temporarily raised in advance in the mold storage area and the mold is transported by the carriage to the mold mounting part of the molding machine. After being moved from a dolly to a molding machine and positioned, it is automatically attached to the molding machine by a hydraulic clamp or the like provided in the molding machine, and a temperature controller is connected to the mold. Then, when the temperature became stable at a predetermined temperature, the molding process was started.

At this time, as a problem, since the mold storage space and the molding machine are far from each other, a trolley is required and a work space for transportation is required. Further, since the distance is long, it takes a long time to replace the mold until it is mounted on the molding machine for molding the mold, and there is a problem that the temperature of the mold, which has been raised in temperature, is lowered.

In order to solve the above-mentioned problems, the present invention shortens the exchange time by providing a cavity unit or a stocker with a nest installed in a molding machine and detaching the cavity unit or the nest with a replacement arm. Along with reducing the working space, the temperature inside the cavity unit or the stocker of the insert is adjusted, and the preliminary temperature adjustment necessary for molding is completed at the same time when the cavity unit or insert is replaced. An object of the present invention is to provide a molding apparatus capable of molding the molding conditions relating to temperature only by fine adjustment.

[Means for Solving the Problems]

The present invention relates to an injection molding machine in which a movable unit having a mold clamping device for driving a movable platen installed therein and an injection unit installed on the back side of a fixed platen are disposed so as to face each other on the upper side of the floor. , A fixed-side mold and a movable-side mold which are respectively mounted on the fixed-side platen and the movable-side platen, and a mounting hole for mounting at least one selected mold element in a detachable manner; The robot is provided with a die stocker for accommodating a plurality of the die elements so that the die elements can be loaded and unloaded, and a robot having a plurality of arms arranged in the injection molding machine and continuous with each other and a chuck supported by the arms. , Any one of the mold elements is carried out from the mold stocker, the mold elements are carried into and mounted on the fixed-side mold and the movable-side mold, and the fixed-side mold is also mounted. And a mold exchanging section configured to remove one die element mounted on the movable side mother die and carry it into the die stocker and store it, and control the operations of the die exchanging section and the die stocker. An injection molding machine characterized by comprising:

In an injection molding machine in which a movable side unit having a mold clamping device for driving the movable side platen installed therein and an injection unit mounted on the back side of the fixed side platen are disposed so as to face each other on the upper side of the floor, A fixed-side mother die and a movable-side mother die that are provided in the fixed-side platen and the movable-side platen, respectively, are provided with mounting holes for detachably mounting the selected mold elements, And a mold stocker that stores the mold elements so that they can be carried in and out freely, and that has temperature control means for adjusting the temperature of the mold elements to a temperature that complies with predetermined molding conditions in advance, and is provided in the injection molding machine. A robot having a plurality of arms connected to each other and a chuck supported by the arms, and any one of the mold elements is carried out from the mold stocker, The fixed-side master mold and the movable-side master mold are loaded and mounted, and one mold element mounted on the fixed-side master mold and the movable-side master mold is removed and carried into the mold stocker and stored. An injection molding machine comprising: a mold exchanging unit configured as described above; and a control unit that controls operations of the mold exchanging unit and the mold stocker.

[Action]

According to the present invention, after the completion of the preceding order molding by the mold elements already mounted on the fixed-side mold and the movable-side mold by the injection molding machine having the above structure, the mold elements necessary for the next-order molding are mounted on the rod arm. The chuck is operated together with the arm through the control unit of the above to mount it in association with the removal operation of the die element of the preceding order, and the molding operation in the injection molding machine is continuously and automatically performed by repeating the same operation. In addition, the mold elements to be replaced are
Preliminary temperature control is performed according to the molding conditions of the injection molding machine, and after mounting on the fixed-side mold and the movable-side mold, it is possible to immediately respond to the next-order molding by temperature control by fine adjustment. It is the one.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 7 show the first embodiment of the present invention.
FIG. 1 is a perspective view showing a main part of an injection molding machine, and FIGS.
Is the fixed side and movable side cavity unit (mold element)
Of FIG. 3, FIG. 3 is a side view in which a part of the arm portion of the exchange arm is shown in an operational state, and FIG. 4 and FIG. 5 are side sectional views showing a detached state of the movable side cavity unit.
FIG. 6 is a side sectional view showing the same mounting state, and FIG. 7 is a side sectional view of the storage portion of the cavity unit.

First, as shown in FIG. 1, in the injection molding machine 1 of the present invention, the fixed side platen 3 is arranged on the left side above the floor 2 of the installation place, and the movable side platen 4 is arranged on the right side so as to face each other. And an injection unit 5 on the back side of the fixed side platen 3.
It is configured by installing.

Further, on the side wall portion 7 of the movable unit 6 in which a mold clamping device for driving the movable platen 4 of the injection molding machine 1 is installed,
An exchange arm 8 for automatic die exchange is provided on the movable platen 4 side, and a die stocker 9 is provided adjacent to the exchange arm 8.

The exchange arm 8 is composed of a multi-joint robot, and the arm portion 10 at the tip is constituted by supporting the three-jaw chuck 11 so that it can be opened / closed and rotated (see FIG. 3).

The mold stocker 9 mounts a cylindrical housing 12 on the side wall 7 and rotatably holds a cavity unit housing 13 in the housing 12 via a stepping motor 14 attached to the side wall 7. The cavity unit accommodating portion 13 is equidistantly provided with a plurality of accommodating holes 15 and a temperature control tube 16 is embedded in the housing 12 (see FIG. 7).

Further, a case is shown in which the fixed side and movable side cavity units 17 and 18 forming various cavities are configured to be removably accommodated in the respective accommodation holes 15.

In FIG. 7, 19 is a drive shaft of the stepping motor 14, and 20 is a support shaft of the cavity unit housing portion 13 connected to the drive shaft 19.

Further, the fixed-side and movable-side platens 3 and 4 are mounted with fixed-side and movable-side mother dies 21 and 22 that are commonly used regardless of the shape of the molded article in the injection molding die, and the respective mother dies are attached. 21 and 22 are formed with a cavity corresponding to the shape of the molded product and
Mounting holes 23 for mounting the fixed-side and movable-side cavity units 17 and 18 (mold elements) in a detachable manner so as to form a single injection molding die (the movable-side mother die 22).
The mounting holes are not shown), and the cavity units 17 and 18 required for the mounting holes 23 can be replaced from the respective parting surfaces 23a (movable side is not shown). Has been done.

Further, a temperature controller 24 is connected to the master molds 21 and 22 via connecting pipes 25 and 26, and the master molds 21 and 22 and the mounting holes 23 of the master molds 21 and 22 are mounted at a molding temperature according to required molding conditions. The temperature control unit 24 is connected to the temperature control pipe 16 of the housing 12 of the mold stocker 9 via a connecting pipe 27, and the cavity units 17 and 18 are configured to control the temperature.
The temperature is adjusted to a desired temperature such as 21, 22 and the like.

Further, the exchange arm 8 and the mold stocker 9 are electrically connected to a control unit 28 disposed on the back side of the movable unit 6, and the control unit 28 is a control unit (not shown) of the injection molding machine 1. ), And actuates the chuck 11 of the arm portion 10 of the exchange arm 8, and
The cavity unit housing portion 13 can be rotated via the stepping motor 14 of the die stocker 9.

Further, an example of the fixed side and movable side cavity units 17, 18 housed in the respective housing holes 15 of the cavity unit housing portion 13 of the mold stocker 9 will be explained in detail with reference to FIG. As shown in FIG. 2A, the insert 31 having the molding surface 31a is fixed in the circular sleeve 30 by the bolt 32, and the partitioning surface 30a of the sleeve 30 is provided with the annular groove 33 concentric with the sleeve 30. It is composed of

The movable side cavity unit 18 is, as shown in FIG.
A projecting rod in which an insert 35 having a molding surface 35a is coaxially attached to a circular sleeve 34 so as to be movable back and forth and is attached to the sleeve 34 via a receiving plate 37 fixed by a bolt 36.
The insert 35 is connected to the 38 by a bolt 39, the projecting plate 40 is connected to the projecting rod 38, and the sleeve 34
The parting surface 34a is formed by forming a concentric annular groove 41.

The fixed side and movable side cavity units 17 and 18 are provided with hexagonal bolts 42 for mounting the mother dies 21 and 22 at positions deviated from the screwing positions of the bolts 32 and 36 shown in FIGS. Are mounted in the bolt holes 43 (see FIG. 4, but the fixed side cavity unit 17 is not shown).

Now, the injection molding machine 1 is configured as described above, and a method of replacing the movable side cavity unit 18 with the replacement arm 8 will be described below with reference to FIGS. 4 to 6.

The fixed-side cavity unit 17 is carried out according to the movable-side cavity unit 18, and thus a detailed description thereof will be omitted.

By the way, when the previous molding in the injection molding machine 1 is completed, the movable cavity unit 18 mounted on the mother die 22 is removed.

That is, as shown in FIG. 4, first, in the molding process in the injection molding machine 1, when the movable side cavity unit 18 of the mother die 22 needs to be replaced, the control unit causes the control unit 28 of the replacement arm 8 to change. When the control signal is input and the arm 29 of the exchange arm 8 is actuated, each claw of the chuck 11 of the arm portion 10 is inserted into the annular groove 41 of the movable side cavity unit 18 mounted on the mother die 22, After clamping the bolt head of the hexagonal bolt 42 fixing the movable side cavity unit 18 to 22, the arm 10 is rotated to release the tightened state of the hexagonal bolt 42 from the mold 22 side ( When a plurality of hexagon bolts 42 are attached, the same operation is repeated to release the attachment state of the movable cavity unit 18 to the mold 22).

Then, as shown in FIG. 5, the movable side cavity unit 18 is armed by inserting the claws 11 of the arm portion 10 into the annular groove 41 of the movable side cavity unit 18 and then expanding the claws 11 in the outer peripheral direction. The movable side cavity unit 18 is removed from the inside of the mounting portion 44 of the mother die 22 while being held by the portion 10, and the arm 29 is operated to retract the arm portion 10 in the direction of the arrow in FIG. The unit 18 is stored in a predetermined storage hole 15b in the cavity unit storage portion 13 of the mold stocker 9.

In storing the movable cavity unit 18 in the predetermined storage hole 15b after the removal, the corresponding storage hole 15b corresponds to the carry-in / out position of the arm unit 10 of the exchange arm 8 with respect to the cavity unit storage unit 13. The cavity unit accommodating portion 13 is rotated by the operation of the stepping motor 14 under the control of the control unit 28 in relation to the operation of the arm portion 10 of the exchange arm 8 so as to be located at.

Therefore, the movable side cavity unit 18 after this removal
Is completely stored in the storage hole 15b of the
Is closed, retracts from the inside of the annular groove 41, and waits for waiting at the loading / unloading position again, and then the cavity unit storage section
After the rotation of 13 and the movable cavity unit 18 of the next order is positioned opposite to the arm portion 10 standing by at the carry-in / out position and stopped, the arm portion 10 is re-armed as shown in FIG.
Moves forward in the direction of the arrow in the figure, and each claw 11 is inserted in the annular groove 41 of the movable cavity unit 18 housed in the housing hole 15b.
Is inserted and is expanded to hold the movable cavity unit 18, and then the arm portion 10 is retracted by the operation of the arm 29 to take it out from the storage hole 15b of the cavity unit storage portion 13.

Then, while operating the arm 29 of the replacement arm 8, the mother die 22
Inserting from the parting surface side into the inside of the mounting portion 44 (see FIG. 4), temporarily move each claw 11 out of the annular groove 41, and again, similarly to the fourth illustration, attach the bolt head of the hexagon bolt 42 to each claw 11. Then, the movable side cavity unit 18 can be mounted on the mother die 22 by screwing the hexagon bolt 42 to the mounting portion of the mother die 22 while rotating the arm portion 10 to complete the tightening.

In this way, the movable side cavity unit 18 can be replaced by automatic work without the need for artificial means, and the fixed side cavity unit 17 can be replaced in the same manner. After the replacement, the injection molding machine 1 Injection molding work can be performed.

Further, during the replacement work of the cavity units 17 and 18, the temperature of the mother molds 21 and 22 and the housing 12 of the mold stocker 9 is controlled by the temperature controller 24 to a temperature according to predetermined molding conditions.

For example, if the molding material in the injection molding machine 1 is PMMA, the temperature of the mother dies 21, 22 and the housing 12 is adjusted to 100 ° C. or the like.
The temperature control by the temperature controller 24 is performed while circulating the temperature control liquid (oil) through the connecting pipes 25, 26 and 27. However, the temperature adjusting means is not limited to the means of this embodiment, and the other temperature adjusting means may be used.

According to the above injection molding machine 1, since only the cavity units 17 and 18 are exchanged while the mother dies 21 and 22 are fixed to the fixed side and the movable side platens 3 and 4, the exchange arm 8 and the mold stocker 9 are replaced. Can be configured with a small diameter, which can save space.

Further, by disposing the replacement arm 8 between the fixed and movable platens 3 and 4 and the mold stocker 9, the working distance of the replacement arm 8 required for replacement of the fixed and movable cavity units 17 and 18 can be reduced. It is possible to obtain the effects of shortening the operation time, speeding up the operation, and further optimizing, and at the same time isolating the mother dies 21, 22 and the housing 12 of the die stocker 9 via the temperature controller 24. Since the temperature is controlled, after the replacement, the mold temperature raising operation can be performed by the fine adjustment required for the molding conditions, and the setup time can be shortened.

In addition, in the configuration of the above-described embodiment, the three-jaw chuck 11 of the arm portion 10 of the replacement arm 8 can be similarly implemented by an air suction chuck or an electromagnet chuck, and the configuration of the die stocker 9 is also possible. For the 8th
As shown in FIG. 9 and FIG. 9, a columnar support body 47 in which a temperature control tube 46 is embedded is fixed to the side wall portion 7 of the movable unit 6 via a support shaft 45, and is attached to the outer periphery of the support body 47. A cavity unit accommodating portion 48 formed of an annular body is rotatably mounted, and the cavity unit accommodating portion 48 has a fixed side and a movable side cavity unit 17, similar to that shown in FIG. 18 compartments 15a, 15b
Are sequentially arranged and the gear 49 of the cavity unit housing 48 is meshed with the drive gear 51 of the stepping motor 50 attached to the side wall 7 to form the mold stocker 90, and the mold stocker 90 is connected to the mold. It is also possible to use it in place of the stocker 9.

Further, as shown in FIG. 9, the cavity unit housing portion 48
Each of the storage holes 15 is provided with a click mechanism 52 for holding the fixed-side and movable-side cavity units 17 and 18, and the sleeves 30 of the fixed-side and movable-side cavity units 17 and 18 housed in the storage holes 15 are provided. The engaging recesses (not shown) of the engaging balls 53 of the click mechanism 52 are provided at corresponding positions on the outer circumferences of the and 34.

The rest of the configuration is the same as that of the above-described embodiment, and the fixed side or movable side cavity unit is placed in the storage hole 15 facing the loading / unloading position of the exchange arm 8.
17, 18 is carried in and out, and the facing of the respective storage holes 15 to the carry-in / carry-out position is caused by the operation of the stepping motor 50.
This is performed by rotating the cavity unit housing portion 48 through 9,51.

Further, the loading and unloading of the fixed side or movable side cavity units 17, 18 with respect to the storage hole 15 is performed through the loading and unloading operation that opposes the elasticity of the spring 54 in the click mechanism 52, and by the elasticity of the spring 54 of the click mechanism 52, It is possible to prevent the fixed-side or movable-side cavity units 17, 18 stored in the storage hole 15 from falling when the cavity unit storage portion 48 rotates.

The spring 54 of the click mechanism 52 is prevented from being pulled out by a spring retainer 55.

Further, the temperature controller 24 and the housing 12 of the die stocker 9 can be connected by a structure in which the circulating oil discharge sides of the mother dies 21, 22 after temperature control are connected.

(Second Embodiment) FIGS. 10 to 16 show a second embodiment of the present invention, and FIG.
And b are perspective views of the fixed side and movable side molds, FIG. 11 is a perspective view of the fixed side and movable side cavity units (mold elements), FIG. 12 is a perspective view of the mold stocker, and FIG. 13 is a mother. FIG. 14 is a perspective view showing a detached state of the fixed side and movable side cavity units with respect to the mold, FIG. 14 is a partial perspective view showing a state of storing the fixed side and movable side cavity units 56, 57 in the mold stocker, FIG. And FIG. 16 is a perspective view showing a mold stocker different from that shown in FIG.

In this embodiment, the fixed-side and movable-side cavity units 56, 57 in the first embodiment, the mother dies 58, 59 for attaching and detaching the fixed-side and movable-side cavity units 56, 57, and the fixed-side and movable-side cavity units 56, 57 are attached.
The configuration of the die stocker 60 is different from that of the first embodiment, and the other configurations are the same as those of the first embodiment, and thus the description thereof will be omitted.

First, the fixed-side and movable-side molds 58 and 59 have the configurations shown in FIGS. 10a and 10b, and are used by being fixed to the fixed-side and movable-side platens shown in FIG. 1, respectively.

Then, the fixed side mother die 58 is a mounting plate for the movable side platen 3.
While fixing the mother die body 62 to 61, the mother die body 62 is provided with an engaging groove 65 of an engaging edge 64 of the fixed side cavity unit 56,
In addition, the parting surface 66 is provided with an engaging hole 69 for an engaging pin 68 projecting from the parting surface 67 of the movable-side mother die 55.

Further, the movable side mold 59 has a mother plate body 71 fixed to a mounting plate 70 with the movable platen 4, and a mounting portion 73 of the movable side cavity unit 57 and an engaging edge of the movable side cavity unit 57 on the mother block body 71. The engaging groove 75 of 74 and the engaging groove 77 of the projecting plate 76 of the movable side cavity unit 57 are provided.

On the other hand, the fixed side and movable side cavity units 56, 5
7 has cavities (not shown) on the parting surfaces 78 and 79, respectively.

Further, the mold stocker 60 is a frame body 78 attached to the side wall portion 7.
Multiple heater rollers 79 equipped with heating means installed in
A belt conveyor 80 is provided between the fixed side and movable side cavity units 5 on the belt conveyor 80.
It is configured by arranging the mounting bases 81 of 6,57.

Further, each mounting table 81 is provided with engaging grooves 82 for engaging edges 64, 74 of the fixed-side and movable-side cavity units 56, 57, and also has a function of an electromagnet. Fixed and movable cavity units that are energized and placed on the upper side of the mounting table 81 located at
It is configured so that the fall of 56 and 57 can be prevented and held.

The fixed side and movable side cavity units 56 and 57 mounted on each mounting table 81 are temperature-controlled via a belt conveyor 80 which is heated by a heating means of a heater roller 79, and the belt conveyor 80 is a control device ( The conversion arm 8 is driven by a servo motor 83 controlled by (not shown), and the conversion arm 8 is configured by providing an electromagnetic force chuck 84 in place of the three-jaw chuck 11 in the arm portion 10 in the first illustrated configuration. There is.

Now, the fixed side and movable side molds 58 and 59 are fixed and set on the fixed side and movable side platens 3 and 4 of the injection molding machine 1 configured as described above via the mounting plates 61 and 70, respectively. The fixed side and movable side cavity units 58 and 59 are attached to the molds 58 and 59 respectively (mounting parts 63 and 73).
(The mounting hole is formed by 3) and the respective engaging edges 64, 74 are mounted in a state of being engaged with the engaging grooves 65, 75, 77.

After the required molding is completed in the injection molding machine 1 under such a set state, at the time when the replacement with the fixed side and movable side cavity units 56 and 57 required for the next-order molding is required, as shown in FIG. Under the mold clamping state of the mother dies 58, 59, the exchange arm 8 is operated to attach the electromagnetic force chuck 84 of the arm portion 10 to the two dies 58, 59. Abutting against and attracting and holding it by electromagnetic force, after removing while pulling out by the mounting portions 63, 73 of both mother dies 58, 59, it is conveyed to the upper side of a predetermined mounting table 81 in the belt conveyor 80 of the die stocker 60. At the same time, the engaging edges 64 and 74 of both cavity units 56 and 57 are engaged with the engaging groove 82, and are placed and stored.

Thereafter, the mounting table 81 on which the fixed-side and movable-side cavity units 56 and 57 are mounted, which are required for the next-order molding, are operated and controlled by the servomotor 83, and the loading / unloading of the replacement arm 8 by the arm portion 10 is performed. When the electromagnetic force chuck 84 attracts and holds both cavity units 56, 57 at the time of facing the position, they are mounted in both mother molds 58, 59 through an operation opposite to the above, and the cavity units 56, 57 The exchange can be completed.

When the molding material in the injection molding machine 1 is PC, the mold stocker 60 is heated to 140 ° C. by the temperature control of the belt conveyor 80 via the heater roller 79, and the mother mold 58,
Both cavity units 5 mounted in the mounting parts 63, 73 of 59
Molding can be started immediately by making fine adjustments of 6,57.

Each of the above operations is automatically performed via the control device.

According to the present embodiment, since the cavity unit can be replaced in the closed state, the fixed side and the movable side can be replaced at the same time, and the replacement time can be shortened. In addition, there is no risk of positional deviation between the fixed side and the movable side, and since the temperature of the mold stocker can be controlled independently, even if the mold temperature between the current molded product and the next molded product is different, With the fixed side and movable side cavity units used as a pair, the temperature can be adjusted to a desired temperature in the mold stocker, and molding can be started immediately after replacement.

In the structure of the mold stocker 60 in the above embodiment, as shown in FIG. 15, both cavity units of the frame body 85 are provided.
A shelf plate 86 in which a mounting table 81 for mounting 56, 57 is arranged in a row is a mold stocker 88 configured to be movable back and forth by an operation motor 87, or as shown in FIG. This can be carried out by using a mold stocker 92 configured by arranging the mounting bases 81 of the mold stocker 60 in a row on the held rotary table 91.

In the above-described embodiment, the case where the two cavity units 56 and 57 are replaced as the mold elements while being attached to and detached from the mother dies 58 and 59 fixed to the fixed and movable platens 3 and 4, respectively.

(Third Embodiment) FIG. 17 is a perspective view of an essential part showing a third embodiment of the present invention.

In the case of this embodiment, instead of disposing the mold stocker 9 on the movable side in the first embodiment, it is arranged on the fixed side, which will be described below. A description will be given of components that are different from the embodiment.

Thus, the mold stocker 93 is arranged on the upper side of the floor 2 in the vicinity of the cylinder 94 of the injection unit 5, a plurality of storage holes 15 are arranged in the cavity unit storage portion 95, and a temperature control pipe (not shown). ) Is buried.

Further, the temperature control pipe of the cavity unit housing portion 95 is connected via a supply pipe 97 to a pump device 96 capable of circulating a fluid such as oil, water, steam or air for temperature control, and the pump device.
96 is a hopper lower 99 of the cylinder 94 through a supply pipe 98,
Moreover, the lower hopper 99 and the temperature control pipe of the cavity unit housing portion 95 are connected via the supply pipe 100.

A heater (not shown) for heating and softening the synthetic resin for injection molding is incorporated in the lower hopper 99, and cooling water for temperature control is introduced to the lower hopper 80 by heating the heater and cooling by the cooling water. It is kept at about ℃.

In addition, the pump device 96 allows the lower hopper 99 and the die stocker
By newly circulating a heat medium such as oil in 93, the heat medium is heated, whereby the temperature of the die stocker 93 can be adjusted to 60 ° C. or higher.

Further, the method of exchanging the fixed side cavity unit and the movable side cavity unit can be performed without much difference from the method of the first embodiment.

According to this embodiment, the heat of the molding machine 1 is effectively used for the temperature control of the die stocker, so that energy saving is realized.

Further, a temperature controller may be used instead of the pump device, and it is more preferable if the temperature of the die stocker 93 can be adjusted to 80 ° C. or higher.

〔The invention's effect〕

According to the present invention, a cavity unit having a nest or a die stocker for accommodating die elements such as a nest is provided in the injection molding machine itself, and a robot arm and a chuck arranged in the injection molding machine are provided. The die elements can be automatically exchanged between the fixed-side mold and the movable-side mold attached to each platen of the injection molding machine through Since the mold element can be replaced without the equipment and work space required to prepare for replacing the injection mold itself as in the conventional case, the mold element can be replaced, Since the replacement robot itself can be made smaller, it is possible to save space as a whole.

[Brief description of drawings]

1 to 7 show a first embodiment of the present invention, FIG. 1 is a perspective view showing a main part of an injection molding machine, and FIGS. 2a and 2b are fixed side and movable side cavity units (molds). Element), FIG. 3 is a side view in which a part of the arm portion of the exchange arm is shown to show an operating state, and FIGS. 4 and 5 are side sectional views showing a detached state of the movable side cavity unit. 6
FIG. 7 is a side sectional view showing the same mounting state, FIG. 7 is a side sectional view of a storage portion of a cavity unit, and FIGS. 8 and 9 are first sectional views.
FIG. 10 and FIG. 16 show a second embodiment of the present invention, and FIG. 10 a and b show the fixed side. FIG. 11 is a perspective view of the fixed and movable cavity units, FIG. 12 is a perspective view of the mold stocker, and FIG. 13 is a perspective view of the fixed and movable cavity units with respect to the mother die. FIG. 14 is a perspective view showing a detached state, FIG. 14 is a partial perspective view showing the fixed side and movable side cavity units 56, 57 stored in the mold stocker, FIGS. 15 and 16.
Fig. 17 is a perspective view showing a mold stocker different from Fig. 12, Fig. 17
The drawing is a perspective view of the essential parts showing a third embodiment of the present invention. 1 …… Injection molding machine 2 …… Floor 3 …… Fixed side platen 4 …… Movable side platen 5 …… Injection unit 6 …… Movable side unit 7 …… Sidewall 8 …… Replacement arm 9,60,88, 90,92,93 …… Mold stocker 10 …… Arm part 11 …… Three claw chuck 12 …… Housing 13 …… Cavity unit housing 14 …… Stepping motor 15 …… Housing hole 16 …… Temperature control tube 17 ...... Fixed side cavity unit (mold element) 18 ...... Movable side cavity unit (mold element) 19 ...... Drive shaft 20 …… Spindle 21,22 …… Mother mold 23 …… Mounting hole 24 …… Temperature control Machine 25,26,27 …… Connection pipe 28 …… Control unit 29 …… Arm 30,34 …… Sleeve 31,35 …… Insertion 32,36,39 …… Bolt 33,41 …… Annular groove 37 …… Support plate 38 …… Projection rod 40 …… Projection plate 42 …… Hexagon bolt 43 …… Bolt hole 44 …… Mounting part 45 …… Support shaft 46 …… Temperature adjustment tube 47 …… Support 48 …… Ca Tee unit storage 49 …… Gear 50 …… Stepping motor 51 …… Drive gear 52 …… Click mechanism 53 …… Engaging ball 54 …… Spring 55 …… Spring retainer 56 …… Fixed side cavity unit 57 …… Movable side Cavity unit 58,59 …… Mother mold 61,70 …… Mounting plate 62,71 …… Mother mold body 63,73 …… Mounting part 64,74 …… Engagement edge 65,75,77 …… Engagement groove 66 , 67 …… Parting surface 68 …… Engagement pin 69 …… Engagement hole 78 …… Frame 79 …… Heater roller 80 …… Belt conveyor 81 …… Mounting table 82 …… Engagement groove 83 …… Servo motor 84 …… Electromagnetic chuck 85 …… Frame 86 …… Shelves 87 …… Operation motor 89 …… Stands 91 …… Rotary table

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 61-149333 (JP, A) JP 62-191113 (JP, A) JP 62-92819 (JP, A)

Claims (2)

[Claims] 1. An injection molding machine in which a movable unit having a mold clamping device for driving a movable platen and an injection unit installed on the back side of a fixed platen are disposed so as to face each other on the upper side of the floor. In which a mounting hole for detachably mounting at least one selected mold element is provided, and a fixed-side mold and a movable-side mold which are respectively mounted on the fixed-side platen and the movable-side platen, and the injection molding machine From a robot provided with a die stocker for accommodating a plurality of the die elements so that the die elements can be carried in and out freely, and a plurality of arms disposed in the injection molding machine and having a plurality of continuous arms and a chuck supported by the arms Which is any one of the mold elements carried out from the mold stocker, the mold elements are carried into the fixed-side mold and the movable-side mold and mounted, and the fixed side A mold exchanging unit configured to remove one mold element attached to the mold and the movable-side mother mold and carry it into the mold stocker and store it, and to operate the mold exchanging unit and the mold stocker. An injection molding machine comprising: a control unit for controlling. 2. An injection molding machine in which a movable unit having a mold clamping device for driving the movable platen installed therein and an injection unit mounted on the back side of the fixed platen are disposed so as to face each other on the upper side of the floor. In which a mounting hole for detachably mounting at least one selected mold element is provided, and a fixed-side mold and a movable-side mold which are respectively mounted on the fixed-side platen and the movable-side platen, and the injection molding machine A mold stocker which is provided and stores a plurality of the mold elements so that the mold elements can be freely carried in and out, and which has temperature control means for controlling the temperature of the mold elements to a temperature according to a predetermined molding condition in advance; A robot having a plurality of arms connected to each other and connected to each other and a chuck supported by the arms, and carries out any one of the mold elements from the mold stocker. The mold element is carried into and mounted on the fixed-side mold and the movable-side mold, and one mold element mounted on the fixed-side mold and the movable-side mold is removed to remove the mold stocker. An injection molding machine, comprising: a mold exchanging unit configured to be carried in and stored in a mold; and a control unit that controls operations of the mold exchanging unit and the mold stocker.