JPH0756181Y2 - Injection molding equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding apparatus for molding a resin molding by injecting a molten resin into a mold forming a cavity from an injection nozzle.

[0002]

2. Description of the Related Art A vertical rotary injection molding apparatus capable of producing multicolored or multi-layered molded products has been known. For example, a vertical rotary injection molding apparatus that manufactures molded products of two colors includes a vertical mold clamping mechanism and injection devices arranged on the left and right of the mold clamping mechanism. This mold clamping mechanism basically comprises a fixed platen, a movable platen, and a mold clamping cylinder, and two pairs of male and female molds are mounted between the fixed platen and the movable platen. Then, the mold clamping cylinder functions to perform mold clamping and pressure clamping, and a space (cavity) sandwiched between the male mold and the female mold of one of the two molds.
Then, for example, red resin is injected from one injection device corresponding to the mold. After the resin has solidified, the mold is opened and the rotary table attached to the movable plate is moved to 180 °.
Rotate once. At this time, the red molded product is moved while being attached to the male mold, and is mounted on another female mold larger than the preceding female mold. Next, mold clamping and pressure clamping are performed, and, for example, yellow resin is injected from the other injection device. After the resin has hardened, the mold is opened and the molded product is taken out. In this way, a molded product having a red part and a yellow part is obtained.

In such a rotary injection molding apparatus, an automatic clamper mechanism using a cylinder having a piston is adopted as a means for attaching / detaching a die to / from a fixed platen and a rotary table. The auto clamper is provided with a limit switch, and when the switch is operated, a lamp provided in each switch case is turned on.

[0004]

However, in a rotary injection molding apparatus having a large number of auto clampers, the switch lamp is difficult to see depending on the arrangement position of the auto clampers, and it is difficult to confirm whether or not the clamps have been normally performed. There was a problem.

It is an object of the present invention to provide an injection molding device capable of easily confirming the operation of the mold attaching / detaching cylinder.

[0006]

In order to achieve the above-mentioned object, a device according to claim 1 has a structure for holding one mold.
A cavity is constructed by fitting the surface plate and one of the molds.
Mounted on the fixed plate and the movable plate that holds the other mold.
A plurality of first molds for detachably mounting the one mold
The mold attachment / detachment cylinder and the movable platen are arranged on the other side.
Second mold mounting / dismounting series for detachably mounting other molds
And the one and the other mounted on the fixed plate and the movable plate.
Injection of molten resin into the cavity consisting of the other mold
In an injection molding device equipped with
Of the plurality of first mold attachment / detachment cylinders provided on the surface plate
Energized or de-energized depending on the operating state
A plurality of first switch means and the movable plate,
Depending on the operating state of the plurality of second mold detaching cylinders
A plurality of second switches that are energized or de-energized.
Switch means and the plurality of first members provided on the fixed plate.
Centralized table showing the energized state or de-energized state of the switch means
The first mold attachment / detachment cylinder operation display portion shown, and the movable
An energization state of the plurality of second switch means provided on the panel
The second mold attachment / detachment system that centrally displays the state or non-energized state.
An injection unit characterized by having a Linda operation display section.
Shape device is the gist.

According to a second aspect of the invention, the cavity is constructed.
The mold holding table that holds the mold to be formed and the mold holding table
A plurality of mold unloaders that are installed and detachably mount the dies.
Of the mounting cylinder and the mold mounted on the mold holding table.
An injection means for injecting a molten resin into the cavity,
In the injection molding device, the plurality of mold detaching cylinders
Depending on the operating status of the
A plurality of switch means and a communication between the plurality of switch means.
Mold detaching series that centrally displays the electrical or non-energized state
A plurality of display elements are arranged in the mold detaching cylinder operation display portion, each of the plurality of switch means is connected in series with each other, and a contact point of each of the plurality of switch means is provided. Each of the display elements is connected to one end side of the pair of switch means in a row.
The clamp signal indicating that the mold has been clamped.
Injection molding characterized in that the raw means are connected in series
Shape device is the gist.

[0008]

In the injection molding apparatus having the above structure, the operating state of the mold detaching / attaching cylinder is centrally displayed on the display unit, so that the operating state can be easily confirmed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of a vertical rotary injection molding apparatus of this embodiment. In FIG. 1, the main body of the rotary injection molding apparatus includes a mold clamping part 1 and injection parts 3, 5 arranged on the left and right of the mold clamping part 1 for injecting molten resin.
Composed of and.

The mold clamping part 1 is basically composed of a mold clamping cylinder 11 having two pistons 7 and 9, a movable platen 13 and a fixed platen 15. This fixed plate 15 has a support 1
7 is erected, and the movable platen 13 is configured to be vertically movable along the column 17. A rotary table 19 which is rotatable by the drive of the rotary drive mechanism 18 is incorporated in the movable platen 13. The fixed platen 15 and the rotary table 19 correspond to the mold holding base of the present invention.

Two metal molds 21, for example, female molds, are mounted on the fixed platen 15 by an auto clamper 41 shown in FIGS. 2 to 3, and a male mold, for example, a male mold, is mounted on the rotary table 19 by the same auto clamper. The two molds 23 are mounted. For example, four auto clampers 41 are provided for each mold. In other words, the fixed platen 15
As shown in FIG. 2, eight auto clampers 41a to 41h are provided.
The rotary table 19 is also provided with eight auto clampers. The number of the auto clampers is appropriately determined according to the shape and weight of the mold.

The auto clamper 41 includes a cylinder tube 43 and a cylinder tube 4 as shown in FIG.
3 and a piston 45 that slides inside. At the rear end of the auto clamper 41, a fluid supply port 47 for supplying a fluid for ejecting the piston 45 into the cylinder and a piston 4
A fluid supply port 49 for supplying a fluid into the cylinder is provided for returning 5 to the initial position in the cylinder tube 43. The fluid is supplied to these fluid supply ports 47, 49 from a fluid supply source (not shown). Fluid supply pipes 51 and 53 are connected. Here, air or oil is used as the fluid. The auto clamper 41 on the fixed platen 15 side is the present invention.
Corresponds to the first mold desorption cylinder, OH <br/> Tokuranpa 41 of the movable platen 13 side corresponds to a second mold desorption cylinder of the present invention.

Further, as shown in FIG. 3 (b), the pistons 4 are provided on both side surfaces of the auto clamper 41 as shown by dotted lines.
A limit switch 55 that is turned on when 5 protrudes, and turned off when it returns to the initial position, and a limit switch 55 that is turned on when the piston 45 returns to the initial position as shown by the solid line and turned off when it protrudes. A switch 57 and is provided. Limiter on the fixed platen 15 side
Switch 55, 57 is the first switch means of the present invention.
The movable table 13 side, that is, the rotary table 19
The mitt switches 55 and 57 are the second switch hands of the present invention.
Corresponds to a step.

Fitting holes (not shown) for fitting the pistons 45 of the auto clamper 41 are provided at the ends of the molds 21 and 23 mounted on the stationary platen 15 or the rotary table 19. When these molds 21 and 23 are mounted on the fixed platen 15 and the rotary table 19,
The molds 21 and 23 are fixed to the fixed platen 15 and the rotary table 19.
Pistons 4 of all auto clampers 41 after mounting on
Fluid is supplied from the fluid supply port 47 so as to project 5. Then, when the molds 21 and 23 are removed from the fixed platen 15 and the rotary table 19, the fluid is supplied from the fluid supply port 49 so as to return the pistons 45 of all the auto clampers 41 to the initial positions.

As shown in FIG. 1, on the front surface of the fixed platen 15, each auto clamper 4 on which a mold 21 is detachably mounted.
Lower clamper operation display section 25 for centrally displaying the operation status of No. 1
The movable platen 13 is provided with an upper clamper operation display portion 27 on the front surface of the movable platen 13 for centrally displaying the operation status of each auto clamper 41 to which the mold 23 is detachably mounted. The lower clamper operation display portion 25 is the first mold attaching / detaching cylinder of the present invention.
Corresponds to the operation display unit, the upper clamper actuating the display unit 27 corresponds to a second mold desorption cylinder operation display unit of the present invention.

LEDs in these display portions 25 and 27
The arrangement of (light emitting diodes) is shown in FIG. As shown in FIG. 4A, the lower clamper operation display portion 25 has 16 Ls.
An ED 61 is provided. Of these, the upper 8 LEDs 6
1a to 61h are the eight auto clampers 41 shown in FIG.
This is for confirming that each piston 45 of Also, the lower eight LEDs 61 are
This is for confirming that the pistons 45 of the eight auto clampers 41 shown in FIG. 2 have returned to the initial positions.

The upper clamper operation display portion 2 shown in FIG. 4 (b).
The arrangement of the LED 61 of No. 7 is the same as that of the lower clamper operation display unit described above. 16 L of upper clamper operation display unit 27
The upper eight LEDs 61 of the ED 61 are for confirming that the respective pistons 45 of the auto clamper 41 arranged on the rotary table 19 have protruded. The lower eight LEDs 61 are for confirming that the pistons 45 of these auto clampers 41 have returned to their initial positions. The LED 61 corresponds to the display element of the present invention.

Next, a circuit for lighting the above LED will be described. As an example, the lower clamper operation display unit 2
Among the circuits for No. 5, the circuits for LEDs 61a to 61h that are turned on by the protrusion of the piston 45 will be described. An example of this circuit is shown in FIG.

In FIG. 5, a power supply line 7 for a predetermined DC power supply
1 and the contact points P1 to P connected in series between the ground wire 73 and the ground wire 73
Reference numeral 8 is a contact provided on each limit switch 55 of the eight auto clampers 41. That is, contact point P
1, P2, P3, P4, P5, P6, P7 and P8 are auto clampers 41a, 41b and 41 shown in FIG. 2, respectively.
These are contacts of limit switches 55 of c, 41d, 41e, 41f, 41g, and 41h.

A relay RL is connected in series to the contacts P1 to P8 connected in series. The relay RL generates a clamp signal indicating that the mold 21 has been clamped. And this relay RL
And a pilot lamp PL are connected in parallel. Further, between the ground line side terminal of each of the contacts P1 to P8 and the ground line 73, the above L is provided via a resistor R.
The EDs 61a to 61h are connected. As described above, in this embodiment, the operation display LED is connected to the circuit for fetching the clamp signal. The relay RL is
It corresponds to the devised clamp signal generating means.

When a clamp switch, which is provided on an operation panel (not shown) and is used for instructing the mounting of a die, is operated, eight auto clampers 41a to 41 arranged on the fixed plate 15 are operated.
Each piston 45 of h projects and each limit switch 55 is turned on. All 8 auto clamps 4
When 1a to 41h operate normally, all contacts P
1 to P8 are closed. Therefore, all the LEDs 61a-6
1 h is energized and lit, and the relay RL is activated.

At this time, the operation of the relay RL generates a clamp signal indicating that the mold has been clamped, and the control unit (not shown) recognizes that the mold has been clamped by this signal. Also, when the relay RL is activated,
The pilot lamp PL lights up.

For example, when an abnormality occurs in the auto clamper 41h corresponding to the contact P8 and the contact P8 is not closed, the LED 61h is not turned on. Further, for example, when an abnormality occurs in the auto clamper 41e corresponding to the contact P5 and the contact P5 is not closed, the LEDs 61 after the contact P5 are not energized.
f, 61g and 61h do not light up. In this way, the contact point P
When any one of 1 to P8 is not closed, the LED 61 after the abnormal contact point does not light up.
If there is an abnormality in a plurality of auto clampers 41, it is not possible to grasp all of the abnormal auto clampers 41 only by looking at the lighting states of 1a to 61h, but at least which auto clamper or later has an abnormality. can do.

As described above, one of the auto clampers 41 is
If any of the contacts P1 to P8 is not closed due to an abnormality in, the current will not flow in the relay RL either.
The pilot lamp PL also does not light. Therefore, when the pilot lamp PL does not light up, by looking at the lower clamper operation display portion 25, it is possible to easily understand which autoclamper is normal and which autoclamper is abnormal.

The circuit of the LED 61 that lights up when the piston 45 of the auto clamper 41 returns to the initial position and the circuit of the upper clamper operation display unit 27 have the same configuration as the above-mentioned circuit, and therefore the description thereof is omitted. Next, with reference to FIG. 6, the operation of the rotary injection molding apparatus having the above configuration will be described. First, the female mold 21 is fixed to the stationary platen 15 by the auto clamper 41, and the male mold 23 is fixed to the rotary table 19. Then, it is confirmed by the lower clamper operation display section 25 and the upper clamper operation display section 27 that they are securely fixed. Next, the rotary table 19 is rotated to rotate the male mold 23 and the female mold 2.
Adjust so that 1 and 2 are opposite to each other. Next, the movable platen 13 is lowered to perform mold closing, and then the male mold 23 and the female mold 21 are clamped by the mold clamping cylinder 11 of the mold clamping unit 1, and the injection unit 3 and the left side of FIG. The molten resin, for example, red resin, is injected into the cavity 81a between the male mold 23 and the female mold 21 through the introduction passage 83a. After the resin is cured, the mold is opened. At this time, the molded product is attached to the male mold 23.
Next, the rotary table 19 is rotated 180 degrees. Then, with the molded product still attached to the male mold 23, the movable platen 13 is lowered to match the male mold 23 and the female mold 21. Here, it is assumed that the female mold 21 on the right side in FIG. 6 is formed to have a cavity 81b larger than that of the female mold 21 on the left side. Next, the melted, for example, yellow resin is injected from the injection unit 5 into the cavity 81b through the introduction path 83b.
After the resin is cured, the mold is opened and the molded product is taken out.
As a result, a molded product having two colors of red and yellow is obtained.

As described above, according to this embodiment, on the front surface of the fixed platen 15 of the rotary injection molding apparatus, the lower clamper for centrally displaying the operating condition of each auto clamper 41 to which the mold 21 is detachably mounted. The movable display 1 is provided with the operation display section 25.
On the front surface of 3, an upper clamper operation display portion 27 for centrally displaying the operation status of each auto clamper 41 to which the mold 23 is detachably mounted is provided, so that the operation status of the auto clamper can be easily confirmed. .

Although the present embodiment has been described above, the present invention is not limited to the above embodiment and can be implemented in various modes. For example, the present invention can be applied not only to a vertical rotary injection molding apparatus but also to a horizontal rotary injection molding apparatus. Also, L for confirming the operation of the auto clamper
If any of the EDs 61 does not light up, the mold clamping may be prohibited.

[0028]

As described above , according to the invention as set forth in claim 1 , the mold mounting / dismounting cylinders on the fixed plate side and the movable plate side, respectively.
Since the operating state of the die is centrally displayed on the operation display section on each of the fixed platen side and the movable platen side, there is an advantage that the operating state of the mold detaching cylinder can be easily confirmed. . Also, the operation display of the mold detaching cylinder on the fixed platen side
Is performed on the operation display section on the fixed platen side, and
The operation display of the Linda is displayed on the operation display section on the movable board side.
By providing each display unit near the switch means
Therefore, the wiring can be easily performed.
According to the second aspect of the invention, since the display section is composed of a simple circuit, it can be provided at low cost. Also,
The switch means are connected in series and each contact
Since the display element is connected, how far is the normal class
To easily know which clamper or later is abnormal
There is an advantage that you can.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a vertical rotary injection molding apparatus of this embodiment.

FIG. 2 is a plan view showing an arrangement of an auto clamper provided on a stationary platen.

FIG. 3 is an explanatory diagram showing an appearance of an auto clamper.

FIG. 4 is an explanatory diagram showing an arrangement of LEDs of an upper clamper operation display portion and a lower clamper operation display portion.

FIG. 5 is a circuit diagram showing a circuit configuration of a lower clamper operation display unit.

FIG. 6 is an explanatory diagram of the operation of the rotary injection molding apparatus of this embodiment.

[Explanation of symbols]

13 ... Movable plate 15 ... Fixed plate 19 ... Rotary table 21, 23 ... Mold 25 ... Lower clamper operation display section 27 ... Upper clamper operation display section 41 ... Auto clamper 43 ... Cylinder tube 45 ... Piston 55, 57 ... Limit switch

Claims (2)

[Scope of utility model registration request] 1. A stationary platen for holding one of the molds and another of the molds which is fitted with the one mold to form a cavity.
The movable platen holding the mold and the fixed platen are mounted so that the one mold can be detachably mounted.
A plurality of first mold attaching / detaching cylinders to be attached and the other die attached to the movable plate are detachably mounted.
A plurality of second mold mounting / demounting cylinders to be mounted, and the one and the other of the one mounted on the fixed plate and the movable plate.
In an injection molding apparatus including an injection unit for injecting a molten resin into the cavity formed of a mold , the plurality of first mold attaching / detaching series provided on the fixed platen.
Depending on the operating status of the power supply
A plurality of first switch means and a plurality of second mold attaching / detaching series provided on the movable plate.
Depending on the operating status of the power supply
A plurality of second switch means and a plurality of the first switch means provided on the fixed plate.
1st gold that centrally displays the energized state or de-energized state of
A mold detaching cylinder operation display portion and a plurality of second switch means provided on the movable plate.
2nd gold that centrally displays the energized state or de-energized state of
An injection molding device , comprising: a mold detaching cylinder operation display section . 2. A metal holding a mold forming a cavity.
It is mounted on the mold holder and the mold holder so that the mold can be attached and removed freely.
A plurality of mold attaching / detaching cylinders, and the cavity of the mold attached to the mold holding table.
Injection molding apparatus having injection means for injecting molten resin into
In accordance with the operating state of the plurality of mold detaching cylinders,
A plurality of switch means that are in a non-energized state or an energized state
And a plurality of display elements are arranged on the mold attachment / detachment cylinder operation display portion, and each of the plurality of switch means is connected in series with each other. each of the one end side of the contacts of the switch means, said and each display element is connected, on the columns of the plurality of switch means, the mold clamping
The clamp signal generation means that indicates
Injection molding equipment characterized in that