JPH0156645B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a horizontal injection molding machine that allows molds to be replaced from below a mold clamping device.

(Prior art) In a horizontal injection molding machine, there are two types of mold replacement: one is done from above the mold clamping device, and the other is done from the side.
It is already known from the publication No. 56-19251.

(Problem to be solved by the invention) The problem when changing molds from above is that the heavy molds are lifted and transported in the air, so the transport device must be more robust than when transporting them on the ground. As a result, the devices tend to become more complex and large, and there are problems such as the need for sufficient installation space indoors.

In addition, when replacing from the side, there are no problems like replacing from above, but mold conveying equipment is installed on the side of the injection molding machine, so compared to when only the injection molding machine is used. As a result, the installation area has increased, and in places with limited floor space, the number of injection molding machines installed has decreased.

In addition, since the injection molding machine and the conveyor are separate units, it is necessary to consider the height difference between the two during installation, and when transferring the mold from the conveyor to the mold clamping device. Unlike the lifting method, this method is difficult, and in order to accurately set the mold in the predetermined position of the mold clamping device, it is necessary to accurately install rollers for transferring the mold on the mold clamping device. Moreover, when transferring the molds, it is time-consuming because the spacing between the die plates must be carefully determined so that the molds do not fall off the rollers or the like.

(Means for Solving the Problems) This invention was devised to solve the above-mentioned conventional problems, and its purpose is to use a machine base to connect an injection molding machine to a mold. An injection molding machine with a new structure that is integrated with a conveyance device, eliminates the disadvantages of installing the conveyance device above or to the side of the injection molding machine, and allows for easy mold replacement. It is about providing.

This invention for the above-mentioned purpose is capable of replacing a mold from inside a machine stand in which a mold clamping device and an injection device are installed sideways. A transport path and a transport means are provided for the mold that moves in the mold opening/closing direction of the clamping device, and an elevating cylinder that transports the mold between the fixed platen and the movable platen is provided below the transport means directly below the mold opening/closing part. This is what will happen.

(Function) The injection molding machine with the above configuration has a conveyance path and a conveyance means inside the machine base, and can transport the mold from the side end of the machine base to the lifting cylinder, and the lifting cylinder operates to move the mold into the mold. can be sent between the fixed platen and the movable platen of the mold clamping device.

On the other hand, the mold removed from the mold clamping device is lowered onto the carrier by the lowering of the elevating cylinder and further transported out of the machine.

Further, the present invention will be explained in detail using illustrated examples.

(Example) In the figure, 1 is a machine stand, and an injection device 2 and a mold clamping device 3 are installed laterally on its upper frame 1a. In the upper part of this machine stand 1, a conveyor 5 for the mold 4 by means of a belt conveyor is located directly below the mold clamping device 3, and is provided so as to be movable in the mold opening/closing direction across both ends of the machine stand 1. be.

Guide members 6 are disposed on both sides of the carrier 5 to prevent the mold 4 consisting of a pair of split molds from falling off and to predetermine the position of the mold relative to the mold clamping device 3.
This guide member 6 forms a conveyance path.

Further, directly below the mold opening/closing part of the mold clamping device 3, an elevating cylinder 7 is installed vertically on the machine stand 1 side for feeding the mold 4 on the carrier 5 between the fixed platen 3a and the movable platen 3b. be.

This lifting cylinder 7 is equipped with a piston 7a that extends from the lower side of the carrier 5 to the mold clamping device 3 through a longitudinal gap 5a provided in the center of the carrier 5,
The mold 4 has a table 7b at the tip of its piston 7a.
It is placed on a boat and unloaded.

Reference numeral 8 denotes a preliminary temperature adjustment device, which is disposed on the side of the carrier between the entrance of the machine 1 and the lifting cylinder 7. As shown in FIG. 2, this preliminary temperature adjustment device 8 consists of a temperature controller 9 and a cylinder 11 that connects a temperature control hose 10 to the side surface of the mold 4. The cylinder 11 is connected to the outside of the guide member 6. Frame 1
2 is installed horizontally. A connecting member 13 connected to the temperature control hose 10 is attached to the tip of the piston of the cylinder 11.

Next, the operation will be described. First, a mold is brought from a mold stocker located elsewhere to the entrance of the machine 1 and placed on the carrier 5.

The mold 4 on the carrier 5 is moved in the mold opening/closing direction,
When the mold 4 reaches the pre-temperature adjustment device 8, the conveyor 5 stops moving due to the action of the sensor.

When the position of the mold 4 is confirmed, the cylinder 11 is actuated by hydraulic pressure, the piston 11a moves forward, and the temperature control hose 10 is connected to the socket on the side of the mold 4. The temperature of the mold 4 is preliminarily controlled to a predetermined temperature by the operation of the temperature regulator 9.

When the mold 4 is pre-temperature controlled, the piston 11
a moves back and the temperature control hose 10 is disconnected,
The carrier 5 moves in the same direction again and carries the mold 4 to just below the mold opening/closing section of the mold clamping device 3. The position of the mold 4 is determined by the action of the sensor when the carrier 5 stops, as in the case of temperature control.

An elevating cylinder 7 is disposed below where the mold 4 is located, and immediately after the conveyor 5 is stopped, the elevating cylinder 7 is actuated by hydraulic pressure to extend the piston 7a upward. Since the mold 4 is already at a stopped position in the direction of extension of the piston 7a, the mold 4 is placed on the table 7b at the tip of the piston 7a, and the fixed platen 3a and the movable platen 3b are placed on the table 7b.
sent between. The mold 4 is divided into both plates and set, and during this time the piston 7a is in an extended state and supports the mold 4.

When the mold setting is completed, the piston 7a is lowered to its original position by the operation of the lifting cylinder 7, and is ready for the next operation.

When replacing the mold 4 set in the mold clamping device 3 with another mold, the elevating cylinder 7 is actuated while the replacement mold 4 is pre-temperature controlled. The mold 4 removed from the tightening device is lowered onto the carrier 5. To remove the mold 4, first extend the piston 7a and use the table 7b at the tip to remove the mold 4.
Do this while supporting.

The mold 4 that has been lowered onto the carrier is sent out to the exit of the machine 1 at the same time as the replacement mold that has been waiting at the temperature control position is transported to the position of the lifting cylinder 7.

This mold can be replaced every time a predetermined amount of molded products are completed. In this case, when one replacement mold is in the temperature control position, the next replacement mold is placed on the carrier at the entrance.

(Effects of the Invention) As described above, the present invention provides a mold conveyance path and a conveyance means within the machine base, and provides an elevating means for fixing the mold below the conveyance means directly below the mold opening/closing part. , with its elevating means, the mold can be replaced from below the mold clamping device, so there is no need to install a conveying device above or to the side of the injection molding machine. The surrounding area can be used effectively as a work space.

In addition, since molds can be replaced using the machine stand, the transport device is simpler and more compact than when replacing molds from above or from the side, resulting in cost savings. Since the mold can be removed or attached while the mold is being replaced, replacement work can be carried out safely without the mold falling.

Furthermore, since molds can be carried in and out continuously using a single carrier installed in the machine, there is less time loss during replacement, and replacement can be done quickly. This machine has extremely useful features as an injection molding machine for high-mix, low-volume production where molds are frequently replaced.

[Brief explanation of drawings]

The drawings schematically show one embodiment of the injection molding machine according to the present invention, in which FIG. 1 is a side view, FIG. 2 is a partially cross-sectional plan view of the temperature adjustment section, and FIG.
FIG. 1... Machine stand, 2... Injection device, 3... Mold clamping device, 4... Mold, 5... Conveyor, 6... Guide member, 7... Lifting cylinder, 8... Preliminary temperature adjustment device .

Claims (1)

[Claims] 1. A mold conveyance path and a conveyance means that move in the mold opening/closing direction of the mold clamping device are provided in a machine stand in which a mold clamping device and an injection device are installed sideways, and a mold conveying path and a conveying means are provided directly below the mold opening/closing part. An injection molding machine characterized in that an elevating means is provided on the side for transferring a mold between a fixed platen and a movable platen.