JPH0244972Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a horizontal mold clamping type mold mounting board consisting of a fixed mold plate and a mating movable plate whose lateral distance can be adjusted in advance. This invention relates to a molding machine equipped with an automatic mold conveyance device, which is configured to carry a mold onto a mold receiver using an automatically operated conveyance device.

According to this type of device, a large mold can be easily transported and installed into an injection molding machine, etc., but the distance between the fixed platen and the movable platen, which are open on the left and right, is set by the mold thickness adjustment mechanism. If it is too large due to a mistake, the mold may fall, and if it is too small, it may collide with the side of the movable mold. Therefore, in the past, it was necessary to temporarily stop the mold conveying device before the mold mounting board and check the amount of mold thickness adjustment, and accidents were likely to occur due to mistakes in this checking work.

In view of this point, it is an object of the present invention to provide a molding machine with an automatic mold transport device that can automatically stop when the positional relationship between the transported mold and its mounting plate is not compatible.

Next, the present invention will be explained based on the illustrated embodiments.

Reference numeral 1 indicates a fixed plate in, for example, a horizontal clamping type injection molding machine, and 2 indicates a movable plate. Rollers 4 and 5, which function as receivers for a mold 3, are disposed below each plate. As is well known, the movable platen 2 can be adjusted to a standby position corresponding to the width a of the mold 3 relative to the fixed platen 1 by a mold thickness adjustment mechanism (not shown) along a guide rod. A clamping ram piston (not shown) drives the mold 3, placed on rollers 4 and 5, forward for further mold clamping. Reference numeral 10 denotes a mold conveying device, which moves the mold 3 along the side wall 12 by rotationally driving a group of rollers 11 on which the mold 3 is placed, for example, by a drive device 15 (FIG. 2) via a chain 16. transport.

A mold sensor 21 detects the proximity of the mold 3 to the inner surface 1' of the fixed platen 1. As this sensor, for example, a limit switch is installed above the fixed platen 1 so that it can come into contact with the upper surface of the mold 3.
It is detected that the sheet contacts the inner surface 1' or approaches the roller 4 to the extent that it does not come off the roller 4. A mold sensor 22 detects the proximity of the mold 3 to the inner surface 2' of the movable platen 2, and a limit switch can be used similarly. Mold sensor 21
is a detection signal only when the side surface of the mold 3 is in contact with the inner surface 1' or is located within a predetermined distance α, that is, a distance that allows the mold to be reliably supported by the rollers 4 without falling. Output. Similarly, the mold sensor 22 outputs a detection signal only when the mold sensor 22 is carried in close to the mold mounting boards 1 and 2 within the distance α. 23 is a mold sensor that detects when the mold 3 enters an area close to the front side 2'' of the movable platen 2. This sensor is configured to detect, for example, a light emitting element and the reflection of the irradiated light by the mold 3. The detection signals from these mold sensors 21 to 23 are transmitted to a control circuit that automatically stops the mold conveying device, which is composed of an exclusive OR circuit 25 and an OR circuit 26 shown in FIG. It becomes input.

The operation is as follows.

The mold 3 placed on the mold conveying device 10 is moved along the side wall 12 erected on the same plane as the inner surface 1' of the stationary platen 1 by rotationally driving the roller 11 by the driving device 15. It is transported and carried into the mold mounting boards 1 and 2. The separation distance b of the movable platen 2 is adjusted in advance, and the movable platen 2 is normally placed on the rollers 4 and 5 without stopping when being carried in, and mold attachment and mold clamping are performed. At this time, the mold sensors 21 and 22 are both connected to an exclusive OR circuit 2 to generate detection signals.
5 does not emit an output signal. Setting interval b of movable platen 2
If the width a of the mold 3 does not match the width a of the mold 3, for example, the mold 3 enters in contact with the inner surface 1' of the fixed platen 1, but if it is carried in at a distance of more than a predetermined distance α from the inner surface 2' of the movable platen 2. In this case, only the mold sensor 21 outputs a detection signal. As a result, the exclusive OR circuit 25 supplies the output signal to the drive device 15 through the OR circuit 26 as a carry-in stop signal. Mold 3 is side wall 1
If the material is not carried in along the line 2 and is tried to be carried toward the movable platen 2 at a distance of more than a distance α from the inner surface 1',
Only the mold sensor 22 outputs a detection signal and similarly stops automatically. If the interval b of the movable platen 2 is set smaller than the horizontal width a, resulting in a positional mismatch, the mold sensor 23 outputs a detection signal, and the logical sum circuit 26
A carry-in stop signal is generated via. Drive device 15
When a carry-in stop signal exceeding a predetermined time width is input, the drive input is cut off and the carry-in is automatically stopped.

In addition, in order to further improve reliability or to detect intrusion from a distance α or more to both inner surfaces 1' and 2', if there is no side wall 12 on the same surface, another mold sensor may be installed. It is placed in the front area between the mold mounting boards 1 and 2 to detect the introduction of molds. A circuit is added that generates a carry-in stop signal when both mold sensors 21 and 22 do not operate even though this mold sensor is outputting a detection signal. For example, the loading of the mold 3 is confirmed by a detection signal from another mold sensor (not shown) shown in FIG.
If both or one of the mold sensors 21 and 22 does not generate a detection signal when this confirmation signal is generated, the switch circuit 36 is activated by the AND circuit 35.
is not opened and a loading stop signal is generated. These control circuits can also be realized by applying a microcomputer that receives each of the above-mentioned sensors as input.

As described above, by using the interlock control device of the mold conveying device which inputs the proximity loading sensor and the collision detection sensor to the mold mounting plate according to the present invention, inappropriate spacing between the fixed platen and the movable platen for the mold width can be prevented. Automatic detection eliminates the need to stop the mold transport device each time. As a result, mold setup can be carried out efficiently, and serious accidents such as falling molds and collisions can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an automatic mold conveyance device according to the present invention, FIG. 2 shows its control circuit, and FIG. 3 shows another embodiment of the control circuit. 1... Fixed plate, 2... Movable plate, 3... Mold,
4, 5, 11...roller, 21-23...mold sensor.

Claims (1)

[Scope of Claim for Utility Model Registration] A horizontal clamping type mold mounting board consisting of a fixed board and a movable board whose lateral distance can be adjusted in advance. In a molding machine equipped with an automatic mold transport device that transports molds using a transport device that operates automatically, it is important to prevent molds from being transported onto the associated mold holder while touching or approaching the inner surface of the fixed plate. a first mold sensor for detecting; a second mold sensor for detecting when the mold is brought into its own mold receiver in contact with or close to the inner surface of the movable platen; a third mold sensor for detecting that the movable platen is being carried into an area close to the side facing the conveying device; and generation of a detection signal from the third mold sensor or the first and second mold sensors; A molding machine with an automatic mold conveyance device, comprising: a control circuit that interrupts operation of the conveyance device in response to generation of a detection signal from only one of the mold sensors.