JPH06344374A - Injection molding machine - Google Patents

Abstract

PURPOSE:To prevent accident from occurring by providing holes for allowing an injection cylinder to enter and shutters for opening and closing said holes on two opposed side surfaces of a vertical type clamping device, which is coupled to a separate and lateral type injection device, and hindering injection operation when the coupling of the injection device on one side only and the opening of the shutter on the other side are detected. CONSTITUTION:A vertical type clamping device 1 has a clamping portion at the upper part thereof and a frame at the lower part thereof, and shielding plates 13a to 13d are interposed among four guide posts 12a to 12d provided upright on the upper side of the frame to form a gate 14 and surround a mold 4. The respective shielding plates 13a to 13d have holes 10, which the tip of a cylinder enters, and shutters 11a to 11d. A microswitch 18 is arranged for each hole 10 and detects the presence of each shutter 11a to 11d. A proximity switch 19 and a coupling member are arranged on each side surface of the frame. When the proximity switch 19 on one side only of the frame detects the coupling of an injection device 2 and the proximity switches 19 on the other sides detect the opening of the shutters, a control device issues an alarm, and injection operation is automatically prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding machine in which a vertical mold clamping device and a horizontal injection device, which are separately installed, are combined.

[0002]

2. Description of the Related Art In an injection molding machine 3 (FIG. 1) in which a vertical mold clamping device 1 and a horizontal injection device 2 are separately mounted, a mold 4 is vertically clamped in the vertical mold clamping device 1. Due to the relationship, in the horizontal injection device 2, the resin is injected in the mold 4 direction.
Although it is a parting surface injection parallel to the joining surface of, the injection can basically be performed from the four sides of the mold (in order to connect the attached equipment, the horizontal injection device 2 is actually connected to the three sides). Is possible).

2 to 4 show how the horizontal injection device 2 is connected to the vertical mold clamping device 1. In FIG. 2, one horizontal injection device 2 is connected to the vertical mold clamping device 1. In FIG. 3, two vertical injection devices 2 (a, b) are connected to one vertical mold clamping device 1 in opposition to each other (one mold opposed type). Double shot type). In FIG. 4, one vertical mold clamping device 1 is used, and two horizontal injection devices 2 are used.
(A, b) are connected in an arrangement in which the emission axis line p is orthogonal (type 1 orthogonal injection type). In the figure, reference numeral 5 is an accessory device, which includes connectors such as power lines and signal lines.

As described above, the injection device can be connected to the vertical mold clamping device 1 from any of four directions,
If necessary, a plurality of injection devices 2 can be combined with one vertical mold clamping device 1 in an arbitrary manner, and the bottom area of the vertical mold clamping device 1 itself is small. Can be changed in various ways, which is advantageous in terms of layout, and in molding, there is an advantage that resin can be injected into one mold from different directions all at once.

On the other hand, the vertical mold clamping device 1 comprises a mold clamping part 5 on which the mold 4 is mounted, and a machine frame 6 supporting the mold clamping part 5 on the lower part. The mold clamping part 5 has four side surfaces. The gate 7 provided with is arranged so as to surround the mold 4. Gate 7
The cylinder 8 of the horizontal injection device 2 when touching the nozzle
A hole 10 is provided so that the front end portion (nozzle 9) can enter, and a shutter 11 is arranged in the hole 10 so as to be closed when unnecessary. The holes 10 are provided on the four side surfaces of the gate 7, and each of the holes 10 (a ...
The shutter 11 (a to d) is arranged in d).

The injection molding operation (in the case of the one-die one-shot type in FIG. 2 as an example) is outlined. First, the shutter 11a of the corresponding hole 10a in the gate 7 of the vertical mold clamping device 1 is opened.
Is opened, and the cylinder tip portion (nozzle 9) of the horizontal injection unit 2 is inserted into the mold clamping portion 4 through the hole 10a. In this state, the tip of the nozzle 8 is nozzle-touched by the mold 4 clamped by the mold clamping portion 5, and the nozzle touch can be released. Then, when the mold clamping process is completed, the resin is injected. When the injection of resin is completed,
The nozzle touch is released, then the mold 4 is opened,
The product is taken out at the mold opening completion position.

At this time, the shutters 11 (b to d) of the other holes 10 (b to d) in the gate 7 are closed in order to prevent an accident during opening and closing of the mold or injection of resin. ing.

However, in practice, it is troublesome to close the shutter 11 other than the position where the tip of the cylinder 8 enters, and even if it is not closed, there is no particular hindrance to the injection operation itself, so it remains open. The injection operation was sometimes performed. For this reason, in the vertical mold clamping device 1 such as the one-type one-injection type or the one-type orthogonal two-injection type (FIG. 4), the hole on the side opposite to the side to which the horizontal injection device 2 is coupled is formed. There is a state where 10 is open, and when a worker is standing at this position, if it is unexpectedly injected or purged, it is considered that the molten resin or the like is bathed. It was very dangerous.

[0009]

SUMMARY OF THE INVENTION The present invention relates to an injection molding machine in which a vertical mold clamping device and a horizontal injection device, which are separately installed, are connected to each other on the side opposite to the side to which the horizontal injection device is connected during injection operation. It is an object to provide an injection molding machine in which the shutter is always closed.

[0010]

The present invention relates to an injection molding machine in which a vertical mold clamping device and a horizontal injection device, which are separately installed, are combined. The vertical mold clamping device includes an upper mold clamping unit and a lower machine frame. The mold clamping part is equipped with a gate. The gate is provided on at least two opposite side surfaces of a hole through which the tip of the injection cylinder can enter and a shutter for opening and closing the hole.

A horizontal injection device can be connected to the machine casing so as to correspond to at least the two opposite side surfaces. The shutter opening / closing detection means and the horizontal injection device coupling detection means are arranged. When the connection detection means detects the connection of the horizontal injection device to one side of the machine frame of the vertical mold clamping device, if the shutter open / close detection means on the other side that is opposed detects the shutter open state, purging occurs. And means for disabling the injection operation including.

[0012]

5 and 6, there is shown an injection molding machine 3 in which a vertical type clamping device 1 and a horizontal injection device 2 which are separately installed are combined into a one-shot one-shot type. The vertical mold clamping device 1 has a mold clamping part 5 at the upper part and a machine frame 6 at the lower part. In the mold clamping unit 5, the shielding plates 13 (a to d) are slidably inserted in the vertical direction between the four guide columns 12 (a to d) provided upright on the upper surface of the machine frame 6, and the plan view is shown. In, a square gate 14 is formed. Mold 4 at gate 14
Is besieged. In addition, when it is necessary to add a to d on the side surface of the machine frame 6 as shown in FIG. 5 and individually indicate each side surface of the machine frame, a. I will do it.

Each shielding plate 13 in the gate 14 has a handle 15, a hole 10 and a shutter 11. Handle 1
Numerals 5 are arranged on both sides of the hole 10 to make it easier to handle the shield plate 13 in the vertical direction. The hole 10 has a size sufficient for the tip of the cylinder 8 to enter. Further, the shutter 11 is of an engagement type (FIG. 5) and has a larger shutter plate 16 than the hole 10.
Engaging projections 17 are formed on both sides of the back surface of the so as to project inward.

Reference numeral 18 is a microswitch, and each hole 10
When the shutter 11 is mounted on the hole 10, the micro switch 18 is operated by the engaging protrusion 17 to be turned on. The on / off state of the micro switch 18 is transmitted to the control device included in the injection molding machine 3. That is, the micro switch 1
Reference numeral 8 constitutes an opening / closing detection means of the shutter 11.

A detector 20 of the proximity switch 19 and a plurality of couplers 21 are arranged on each side of the machine casing 6 (FIG. 6). The detection body 20 is a dog 22 attached to the injection device 2 side.
(FIG. 5) forms a proximity switch 19 in a pair, and the proximity switch 19 is turned on only between the lateral injection device 2 and the side surface of the machine casing 6 to which the horizontal injection device 2 is connected. It is detected that the ejection device 2 is connected. The detection signal is transmitted to the control device provided in the injection molding machine 3. That is, the proximity switch 19 is a connection detecting unit of the horizontal injection device.

The control device of the injection molding machine 3 also detects the connection of the horizontal injection device 2 to one side of the machine frame 6 in the vertical mold clamping device 1 when the connection detection means of the horizontal injection device detects this connection. If the other horizontal injection device 2 is not coupled to the other side opposite to the one side and the shutter open / close detection means on that side detects the open state (open) of the shutter, the one side is detected. A means for disabling the injection operation of the horizontal injection device 2 coupled to is provided (the operation will be described later). This injection operation includes purging operation.

A plurality of connecting members 21 are arranged and fixed on both sides of each side surface of the machine frame 6, and can be connected to the horizontal injection device 2. The vertical mold clamping device 1, the horizontal injection device 2, and their combined structure are the same as in the conventional example. Reference numeral 23 is an accessory device in which a power line connector, a signal line connector, and the like are housed.

The injection molding operation will be described by taking the one-stroke one-shot type as an example. When the horizontal injection device 2a is connected to the one side surface 6a of the machine frame 6 and the injection molding operation switch of the horizontal injection device 2a is turned on, the control device first performs the process of FIG. 7 according to a program stored in advance. Check safety.

In step S1, the side surfaces (a to
d) which the horizontal injection device 2 is connected to, and each shutter 11 on the side surfaces (a to d).
Whether or not (a to d) are closed is read and stored for each side. In step S2, it is determined whether the coupling means on the opposite side is on or off. In this case, the opposite side coupling detecting means is the proximity switch 19c. The proximity switch 19c is off because it is a one-shot, one-shot type, and the process proceeds to step 4.

In step S4, it is determined whether the opposite shutter is opened or closed. In this case, since the shutter 11c is attached (FIG. 5) and the ON signal is transmitted to the control device by the microswitch 18, the process proceeds to step S3, and the injection molding operation can be performed.

If the shutter 11c is not attached and the hole 10c is left open in step S4, the micro switch 18 sends an off signal to the control device, so that the process proceeds to step 5 and an alarm is issued. The alarm automatically blocks the execution of the injection molding operation and alerts the operator.

In this way, the horizontal injection device 2a coupled to the one side surface 6a of the machine casing 6 as the one-shot one-shot type has the other horizontal injection device 2c mounted on the opposite side thereof and the hole 10c.
Is not closed, or the shutter 11c is mounted and the hole 10 is not closed, the injection molding operation cannot be executed.

Clearing the alarm such as mounting the shutter 11c is one of the many conditions that the horizontal injection device 2a must meet to perform the injection molding operation. 3 operates in the same manner as the conventional one, and injection molding is performed.

Although the case of the one-type one-shot type has been described, the same determination is made in the case of the one-type opposed two-shot type and the one-type orthogonal two-shot type, and the vertical mold clamping device 1 A horizontal injection device 2 connected to one side cannot perform an injection molding operation on its opposite side unless the hole 10 is closed.

In FIG. 5, side surface d (accessory device 2
2) is also shown with a shield plate 13, a hole 10 and a shutter 11. However, since the horizontal injection device 2 is not connected to the side surface d, such a structure is originally unnecessary. is there. However, like the horizontal injection device 2, it is up to the user to determine which side of the vertical mold clamping device 1 the accessory 23 is attached to. Therefore, the gate 14 may have the same structure on all four sides.

The above is an embodiment, and the present invention is not limited to the illustrated specific configuration. The shutter opening / closing detecting means and the coupling detecting means may be configured by using detecting means other than the micro switch and the proximity switch. The cancellation of the alarm is one of many injection molding execution conditions in the injection molding machine 3.

[0027]

EFFECT OF THE INVENTION In an injection molding machine in which a vertical mold clamping device and a horizontal injection device, which are separately installed, are combined with each other, a worker who happens to be on the opposite side of the horizontal injection device is accidentally exposed to the molten resin due to an unexpected injection molding operation. It is possible to completely prevent such accidents.

[Brief description of drawings]

FIG. 1 is a front view (conventional example).

FIG. 2 is a plan view (one type, one shot type).

FIG. 3 is a plan view (one type facing two shot type).

FIG. 4 is a plan view (type 1 orthogonal firing type).

5 is a plan view (partial example) of a part of which is a cross section taken along line AA of FIG. 6. FIG.

6 is a side view taken along line BB in FIG. 5 (Example).

FIG. 7 is a flowchart at the beginning of operation.

[Simple explanation of symbols]

 1 Vertical mold clamping device 2 Horizontal injection device 3 Injection molding machine 4 Mold 5 Mold clamping part 6 Machine frame 7 Gate 8 Cylinder 9 Nozzle 10 Hole 11 Shutter 12 Guide post 13 Shielding plate 14 Gate 15 Handle 16 Shutter plate 17 Engagement Protrusion 18 Micro switch 19 Proximity switch 20 Detecting body 21 Coupling tool 22 Dog 23 Ancillary equipment

Claims (1)

[Claims] 1. An injection molding machine in which a vertical mold clamping device and a horizontal injection device, which are separately installed, are coupled to each other, wherein the vertical mold clamping device has a hole through which a tip portion of an injection cylinder can enter a mold clamping portion in an upper portion. And at least 2 shutters to open and close this hole
In addition to the gate provided on the side surface, a horizontal injection device can be coupled to the lower machine frame corresponding to at least the two opposite side faces, and the opening / closing detection means of the shutter and the connection detection means of the horizontal injection device are coupled to each other. Is arranged, when the binding detection means detects binding of the horizontal injection device to one side of the machine frame in the vertical mold clamping device, another horizontal injection device is not coupled to the opposite other side, Further, the injection molding machine is provided with means for disabling an injection operation including purging when the shutter opening / closing detecting means detects "open".