JPH05269795A - Injection molding machine - Google Patents

Abstract

PURPOSE:To simply set an injection molding condition by providing a signal input/output connection terminal to one of a plurality of fixed molds and provid ing a selection means selectively outputting an inputted predetermined signal and providing a connection means to the connection terminal in a freely detach able manner to control an injection part on the basis of the output signal from the selected mold. CONSTITUTION:Wirings P1-P7 are arranged so that the terminal T0 and respective terminals T1-T7 connected to a common line on the side opposite to the side connected to the connection plug of the connection terminal 213 of a mold 21 respectively communicate with each other. By this constitution,(left primary injection)-(180 deg. table rotation) are selected. A selection means is constituted of the wirings P1-P7 and respective modes can be selected by changing over the wirings. The respective relays of signal terminals T1-T9 are provided to a control part 31 and a molding condition selecting relay operated by the combination pattern of the relays is provided to the control part 31. The mold 21 and the control part 31 are connected by a connection cord. Therefore, only by connecting a connection means to the mold 21, an injection condition can be set.

Description

Detailed Description of the Invention

[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 articles has been conventionally 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 is basically composed of a fixed plate, a movable plate, and a mold clamping cylinder, and two pairs of male and female molds are mounted between the fixed plate and the movable plate. Then, by the action of the mold clamping cylinder, mold clamping and pressure clamping are performed, and in the space (cavity) sandwiched between the male mold and the female mold of one of the two molds,
For example, red molten resin is injected from one injection device corresponding to the mold. After this resin solidifies, the mold is opened,
The rotary table attached to the movable plate is rotated 180 degrees. At this time, the red molded product is moved while being attached to the male mold, and is attached to another female mold larger than the preceding female mold. Next, mold clamping and pressure clamping are performed, and, for example, a yellow molten resin is injected from the other injection device. After the resin hardens,
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.

[0003]

However, in the above rotary injection molding apparatus, which of the left and right injection apparatuses is used to inject the molten resin first, and the position where the molded product is to be taken out depends on the left and right. The setting of molding conditions such as which injection device is to be used is performed by operating a large number of switches provided on the operation panel. For this reason, when many types of molded products are manufactured by the injection molding apparatus, it is necessary to reset the molding conditions each time the type of molded product changes, and there is a problem that this setting work is complicated. ..

An object of the present invention is to provide an injection molding apparatus which can easily set molding conditions.

[0005]

In order to achieve the above object, the invention as set forth in claim 1 is a fixed plate on which a plurality of fixed molds having a cavity surface forming a cavity can be mounted, and the fixed plate. A movable plate, which is provided so as to face each other and on which a plurality of movable molds forming a pair with the plurality of fixed molds can be mounted, and the movable plate is moved to move the plurality of fixed molds and the plurality of movable molds. A mold opening / closing mechanism for joining and separating the mold, and a rotating mechanism for rotating the movable plate with respect to the fixed plate,
In an injection molding apparatus including a plurality of injection parts for injecting a molten resin into a plurality of cavities composed of the plurality of fixed dies and the plurality of movable dies, the plurality of fixed dies or the plurality of injection dies At least one of the movable molds has a connection terminal having a plurality of terminals for signal input and signal output, and a selection for selectively outputting a predetermined signal input from the signal input terminal to the signal output terminal. And a connection means capable of being detachably connected to the connection terminal of the mold, and a signal transmission for transmitting a plurality of signals related to the injection molding condition to the signal input terminal via the connection means. Means, and based on the output signal from the mold selected by the signal selection means, by controlling the mold opening and closing mechanism, the rotating mechanism and the plurality of injection units, a predetermined mold specific Molding And gist injection molding apparatus characterized by comprising a control means for performing an injection molding operation by matter.

The invention according to claim 2 is characterized in that the connecting means is an outlet which is fitted and connected to a plurality of pins.

[0007]

In the injection molding apparatus of the present invention having the above structure,
A plurality of signals relating to the injection molding conditions are sent from the signal sending means to the die connected to the die via the connecting means, and the selection means provided in the die selects one of the signals input from the signal input terminal. Predetermined signal is selectively output to the signal output terminal. Then, based on the signal output from the mold, the control means controls the mold opening / closing mechanism, the rotating mechanism, and the plurality of injection parts, and the molding operation is performed under predetermined molding-specific molding conditions. Therefore, it becomes possible to easily set the molding conditions specific to the mold.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 3, the main body of the vertical rotary injection molding apparatus according to the present embodiment includes a mold clamping unit 1 and injection units 3, which are disposed on the right and left sides of the mold clamping unit 1 and which inject a molten resin. 5 and.

The mold clamping unit 1 basically comprises 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 column 1
7 is erected, and the movable platen 13 is configured to be vertically movable along the column 17. A rotary table 19 that is rotatable by the drive of the rotary drive mechanism 18 is incorporated in the movable platen 13. The mold clamping unit 1 corresponds to the mold opening / closing mechanism of the present invention.

Two male molds 23, for example, are mounted on the rotary table 19 by an auto clamper 20 arranged as shown in FIG. 4, and two metal molds, for example, two female molds are mounted on the fixed plate 15. The mold 21 is mounted by a similar auto clamper. At least one of the molds 21 has a structure shown in FIG.
A connection terminal 213 having, for example, 12 connection pins 211 as shown in FIG. As shown in FIG. 6, the connection terminal 213 and the control unit 31 of the injection molding apparatus are connected via a connection cord 33, and the connection plug 35 has the same number of connection pin holes as the connection pins 211 (not shown). ) Is provided. The connection terminal 213, the connection plug 35, and the connection cord 33 constitute the connection means of the present invention. The mold 2
The connection terminal 213 may be attached to one side of the No. 3 side.

Next, the connection state between the control unit 31 and the mold 21 will be described with reference to FIG. The control unit 31 uses the signal terminal T0
~ T9. The signal terminal T1 is a terminal for outputting a selection signal for selecting the "left primary injection mode" in which the injection device 3 on the left side shown in FIG. Signal terminal T2
On the contrary, is a terminal which outputs a selection signal for selecting the "right primary injection mode" in which the injection device 5 on the right side first performs the injection. The signal terminal T3 is a terminal for outputting a selection signal for selecting a "table pre-rotation eject mode" in which a molded product is ejected by an ejector (not shown) before the rotary table 19 rotates. The signal terminal T4 ejects the molded product after the rotation of the rotary table 19 "
It is a terminal for outputting a selection signal for selecting the "eject mode after table rotation". A signal terminal T5 is a terminal for outputting a selection signal for selecting the "two-color molding mode". The signal terminal T7 is for the rotary table 19. The signal terminal T0 is a terminal for outputting a selection signal for selecting to rotate 180 degrees, and the signal terminal T0 is a terminal to which a common line is connected.

The signal terminal T6 is used when selecting three-color molding in an injection molding apparatus capable of three-color molding.
The signal terminal T8 is used in the rotary table 1 in the same device.
It is used when it is selected to rotate 9 by 120 degrees and then 120 degrees in the same direction, and the signal terminal T9 is used in the same device to rotate the rotary table 19 first in one direction.
Used when choosing to rotate 0 degrees and then 120 degrees in the opposite direction.

In this embodiment, as shown in FIG. 1, the mold 21 is used.
On the side opposite to the side of the connection terminal 213 connected to the connection plug, the wirings P1, P4, P5 and the wirings P1, P4, P5 and T7 connected to the common line are electrically connected to the terminals TI, T4, T5 and T7. P7 is wired.
Thereby, "left primary injection", "eject after table rotation", "two-color molding" and "180 degree table rotation" are selected. Such wirings P1, P4, P5 and P7 constitute the selecting means of the present invention. As can be seen from FIG. 1, for example, when the "right primary injection mode" is selected, the wiring P2 may be provided instead of the wiring P1 in the mold 21.

Although not shown, the control section 31 is provided with a signal transmission circuit for transmitting a predetermined level signal from each of the signal terminals T1 to T5 and T7. The signal terminals T1 to T9 of the controller 31 are provided with relays R1 to R9 (only the relays R1, R4, R5 and R7 are shown in FIG. 2). Further, the control unit 31 is provided with a molding condition selection relay that operates according to a combination pattern of the relays R1 to R9. For example, relays R1, R4, R5 and R
As shown in FIG. 2, for the combination of 7 relays R100
Is provided. That is, as shown in FIG.
1 and the mold 21 are connected, relays R1, R4, R
Contact points S1 that are opened and closed by the respective operations of 5 and R7
S4, S5 and S7 are closed, and the relay 100 is activated.

Further, the control section 31 has an automatic operation switch SW1 for instructing an automatic operation, a start switch SW2 for instructing the start of a molding operation, and an ON state when the mold is in the state of completion of mold opening. A switch SW3, a switch SW4 that is turned on when the rotary table 19 is at a predetermined rotation reference position, and a switch SW that is interlocked with the switch SW4 and that is turned off when the switch SW4 is on.
5 and relays R200 and R300 connected to the switches SW4 and SW5, respectively. Relay R2
00 is for outputting a start signal for starting the molding operation, and relay R300 is for outputting an error signal.

Next, the operation of this embodiment will be described.
First, the male die 23 is fixed to the rotary table 19 by the auto clamper 20, and the female die 21 is fixed to the fixed plate 15 by the auto clamper. next,
The connection plug 35 is fitted into the connection terminal 213 arranged on one side of the mold 21. As a result, the mold 21 and the control unit 31 are connected via the connection cord 33. At this time, the signal terminals T1, T4, T5 and T7 are electrically connected to the signal terminal T0, so that the relay R provided at these signal terminals is connected.
1, R4, R5 and R7 are actuated and the contacts S1, S4,
S5 and S7 are closed, and relay R100 is activated.

Then, the automatic operation switch SW1 for instructing the automatic operation is turned on, and the start switch SW2 for instructing the start of the molding operation is turned on. If the mold is completely opened, the switch SW3 is closed, and if the rotary table 19 is at the predetermined reference position,
The switch SW4 is closed and the relay R200 operates. As a result, the molding operation is started.

That is, in this case, as shown in FIG.
Since the male mold 23 and the female mold 21 face each other, the movable platen 13 is lowered to perform mold closing, and then the male mold 23 and the female mold 21 are closed by the mold clamping cylinder 11 of the mold clamping unit 1. Are clamped, and the molten resin, for example, red resin, is injected from the injection unit 3 into the cavity 41a between the left male mold 23 and the female mold 21 shown in FIG. After the resin is cured, mold opening is performed. At this time, the molded product is attached to the male mold 23. Next, the rotary table 19 is rotated by 180 degrees, and the movable platen 13 is lowered to match the male mold 23 and the female mold 21 with the molded product still attached to the male mold 23. Here, it is assumed that the right side female mold 21 shown in FIG. 7 has a larger cavity than the left side female mold 21. Next, the melted, for example, yellow resin is injected from the injection unit 5 into the cavity 41b. After the resin is cured, the mold is opened, and an ejector (not shown) is operated to take out the molded product. As a result, a molded product having two colors of red and yellow is obtained.

On the other hand, if the rotary table 19 is not at the predetermined reference position, the switch SW4 is opened and the switch SW5 is closed instead, and the relay R300 is operated to display an error. At this time, the relay 200 does not operate, so the molding operation is not started.

As described above, according to this embodiment, the mold 2
The injection molding conditions can be set by connecting the connection plug 235 provided at the tip of the connection cord 33 to the connection terminal 213 provided on the No. 1. Therefore, it is not necessary to operate a large number of switches as in the conventional case.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment and can be implemented in various modes. For example, not only the vertical rotary injection molding apparatus but also a horizontal rotary injection molding apparatus may be applied. Further, in the present embodiment, the mold and the control unit were connected using the connection terminal having the connection pin and the pin hole,
You may use the connection means etc. which consist of the conductive terminal patterned on the printed circuit board, and the socket fitted with this terminal.

[0022]

As described above, according to the present invention, the injection molding condition can be set only by connecting the connecting means to the mold. Therefore, the time required for manufacturing can be shortened.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a connection state between a control unit and a mold of an injection device of this embodiment.

FIG. 2 is a circuit diagram showing a partial electrical configuration of a control unit.

FIG. 3 is a front view showing the configuration of the main body of the vertical rotary injection molding apparatus of this embodiment.

FIG. 4 is an explanatory diagram showing an arrangement of auto clampers arranged on a rotary table.

FIG. 5 is a perspective view showing connection terminals arranged in a mold.

FIG. 6 is an explanatory diagram showing a connection state between a control unit and a mold.

FIG. 7 is an explanatory diagram of the operation of the present embodiment.

[Explanation of symbols]

3, 5 ... Injection device 21 ... Mold 31 ... Control unit
33 ... Connection cord 35 ... Connection plug P1, P2, P4, P5, P7 ...
Wiring R1, R4, R5, R7, R100 ... Relay

Claims (2)

[Claims] 1. A fixed platen on which a plurality of fixed molds having a cavity surface forming a cavity can be mounted, and a plurality of movable molds which are provided so as to face the fixed plate and form a pair with the fixed molds. A movable plate on which a mold can be mounted, a mold opening / closing mechanism that moves the movable plate to join and separate the plurality of fixed molds and the plurality of movable molds, and the movable plate to the fixed plate. An injection molding apparatus comprising: a rotating mechanism for rotating the rotating mold against each other; and a plurality of injection sections for injecting a molten resin into a plurality of cavities composed of the plurality of fixed dies and the plurality of movable dies, A fixed mold or at least one of the plurality of movable molds, a connection terminal having a plurality of terminals for signal input and signal output, and a predetermined signal inputted from the signal input terminal selectively. Output to the signal output terminal A connecting means that includes a selecting means and is detachably connectable to the connecting terminal of the mold; and a signal that sends a plurality of signals related to the injection molding condition to the signal input terminal via the connecting means. Based on the output signal from the sending unit and the mold selected by the signal selecting unit, the mold opening / closing mechanism, the rotating mechanism, and the plurality of injection units are controlled, and a predetermined mold specific An injection molding apparatus comprising: a control unit that performs an injection molding operation according to the molding conditions of. 2. The injection molding apparatus according to claim 1, wherein the connecting means is an outlet fitted and connected to a plurality of pins.