JP2009023268A - Mold replacement device for two-mold mounting injection molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-traveling mold replacement device capable of replacing two sets of molds in a short time in mold replacement of a two-material injection molding machine having two molds, that is, a movable template side mold and a fixed template side mold, or a molding machine for a stack mold. <P>SOLUTION: The device is provided with a mold replacing truck 1 movable along a guide rail 2 arranged close to and parallel to the injection molding machine 10, a plurality of loading platforms 1a-1d capable of simultaneously mounting at least three sets of the molds 1-4, and free roller belt conveyers 60L and 60R for carrying in and out the mold between the adjacent injection molding machines disposed on all of the loading platforms. Both of the round travelling time of the mold replacing truck 1 and the mold re-loading work time can be dispensed with, stop time by replacement of the mold of the injection molding machine can be drastically reduced, and the mold for replacement for a plurality of the molding machines can be simultaneously installed, and therefore, the mold re-loading work time in a warehouse can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to die replacement of a two-material injection molding machine or a stack molding molding machine that mounts a mold on the movable mold platen side and a mold on the fixed mold platen side. The present invention relates to a self-propelled mold exchanging apparatus that allows a set of molds to be exchanged.

In recent years, with the diversification of molded products, various types and small quantities are often produced with a single injection molding machine. On the other hand, an integral molding machine with two types of resin is also put into practical use, and a single injection machine is used. In some cases, two sets of molds are mounted on the molding machine, and the frequency of mold replacement tends to increase.
In general, when changing molds for injection molding machines, the molds themselves are heavy, especially for large molds, which can be 20 tons or more, requiring manual operations such as cranes, etc. It is a heavy work that takes time even with the experience and skill of workers, such as the need for cores, etc. The operating efficiency of the molding machine brought down by the stopping in the meantime, and it is essential to secure maintenance personnel, etc. It was one of the problems in factory management.

As an example of conventional mold replacement, a mold replacement technique for saving labor of the heavy work is disclosed in Patent Document 1. According to this document, on a gantry provided at a position adjacent to a side surface of a normal one-type injection molding machine, a moving table attached to be movable in the moving direction of the movable mold plate, and the moving table A plurality of mold exchanging stations which are arranged at predetermined intervals in the moving direction of the movable mold platen and move the molds between the fixed mold plate and the movable mold plate from the side, and move with the movable mold platen. Connecting means for detachably connecting the table, and moving the moving table together with the movable mold platen via the connecting means to move the mold changing station on the moving table to a predetermined mold changing position. I try to let them.
The mold is supported and aligned at the center of the injection molding machine (the center of the mold platen) by a mold delivery roller attached to the fixed mold plate and the movable mold plate. Carrying in is carried out by an operator using a push-pull tool.
Further, the mold is attached or detached from the mold platen mechanically by the action of an automatic clamper provided in the injection molding machine.

Furthermore, Patent Document 2 discloses an injection mold changing system for mechanizing a mold changing operation. According to this document, when a set of molds is mounted on a single injection molding machine, the table for receiving the mold currently in use and the stand for the mold to be used next are placed on the table. The mold receiving table and standby table are each provided with a positioning mechanism for loading / unloading the mold into / from the injection molding machine and a mechanism for loading / unloading the mold into / from the injection molding machine. A mold change system using a mold change cart is described.
For the mold replacement of the two-type mounting injection molding machine (for example, Patent Document 3) handled by the present invention, in the technique according to Patent Documents 1 and 2, every time one type of the two-type injection molding machine is replaced, Push the mold exchanging cart back to the mold warehouse, discharge the used mold and load the second set of renewed molds, go to the injection molding machine again, and replace the mold Since it needs to be done, time spent and labor are issues that cannot be overlooked.

JP 2001-26039 A (FIGS. 1 and 2) JP 2002-1771 A (FIG. 1) Japanese Patent Publication No. 3-51207 (Fig. 1)

The first problem is shortening the time for stopping the injection molding machine for mold replacement. In particular, when the conventional technique as described above is applied to the mold exchange of the two-type injection molding machine, the mold exchanging carriage reciprocates between the injection molding machine and the mold preparation warehouse, and It is a solution to the problem that time-consuming process of re-loading the mold in the warehouse is indispensable.
In the preparation warehouse, it is necessary to eliminate the contradiction that must be spent time while the molding machine is stopped to reload the mold.

  The second problem is that the method of exchanging two sets at the same time, rather than sequentially exchanging two sets of molds, eliminates the need for position adjustment time, etc. Therefore, it is obvious to provide a mold exchanging apparatus that enables the simultaneous exchanging method.

The third problem is a problem peculiar to a two-material molding machine equipped with two molds. That is, in the replacement of the molds on the fixed mold platen side of the two sets, since the mold mounting surface position of the fixed mold platen does not change, the stop position of the mold exchanging carriage is always the same. In the replacement of the mold attached to the movable mold platen side that does not face the mold mold surface position of the rotary mold plate and the movable mold platen can vary depending on the thickness of the mold on the fixed mold platen side, The problem is that the stop position of the mold loading platform on the mold exchanging carriage must be set to an arbitrary position within a limited range.
Therefore, it is to provide a control system in which the position of the mold loading platform on the exchange cart can be stopped and held at an arbitrary point within the specific range.

The fourth problem is mechanization that eliminates heavy manual labor. It is necessary to make the mold exchanging cart self-propelled, move the mold loading platform, and mechanize the mold loading / unloading means.
In addition, the mechanization of the mold exchanging cart and the mold loading platform requires the construction of a control system for executing speed control, position control, timing control, and the like, and further, with the central control panel of the injection molding machine. It is also necessary to add various signal / data exchange functions.

The present invention solves the above problems by the following means.
(1) The mold changing device for the two-type mounting injection molding machine of the first means is a two-type mounting injection for mounting two sets of molds, such as a mold plate reversing type two-material molding machine or a stack molding molding machine. In the molding machine, it is attached to all of the loading platforms, a moving means that can move along the guideline that is close to and parallel to the molding machine, a plurality of loading platforms that can simultaneously mount at least three sets of molds. And a means for carrying out and carrying in a mold between adjacent molding machines, and at least one of the plurality of loading platforms is empty, and is updated on each of the other loading platforms that are not empty. A self-propelled mold exchanging carriage on which a mold can be placed, and an empty loading platform of the self-propelled mold exchanging carriage are removed from the molding machine and held between mold dies. After moving the mold change cart so that it is next to the mold, After the used first mold is carried out to the empty loading platform by the unloading / unloading means, the mold exchanging carriage is moved, and the first mold is removed from the renewal mold that has been placed. It has a control device which can be controlled so as to carry out a subsequent mold change by carrying in the space between the mold dies later and applying the above process to the second mold. .

  (2) The mold changing device of the second mold mounting injection molding machine of the second means is a two mold mounting injection that mounts two sets of molds such as a mold plate reversing type two-material molding machine or a stack molding molding machine. In the molding machine, a moving means that can move along a guideline that is close to and parallel to the molding machine, a plurality of loading platforms that can simultaneously mount four or more sets of dies, and all of the loading platforms And a plurality of sets of loading platforms that are not loaded with at least two loading platforms among the plurality of loading platforms. Above, a self-propelled mold exchanging carriage on which each of the renewal molds can be placed, and two sets of used molds, which are removed from the molding machine and held between the molds, are placed next to the two sets of used molds. After moving the die change cart so that it becomes Move the mold exchanging carriage after the two sets of used molds removed from the injection molding machine at the same time or with a slight time difference to prevent impact, and then move to the empty loading platform. The two sets of renewal molds placed at the same time, or by the process of carrying in toward the space between the molds after removing the two sets of molds with a slight time difference to prevent impact And a control device that can be controlled to perform simultaneous two-type exchange.

  (3) The mold changing apparatus for the two-type mounting injection molding machine of the third means is the mold changing cart in the mold changing apparatus of the two-type mounting injection molding machine of the first means or the second means. Further, the die rails for moving each mold carrier and the respective mold carriers independently move in the horizontal direction on the mold exchange carriage on the mold exchange carriage, and then the stop fixing is performed. And a mold carrier moving means, and a position detecting means for detecting an arbitrary position of the mold carrier on the mold exchanging carriage, and the control device is further provided for the mold. A platform stop position setting unit is provided, and the mold platform is replaced with the mold platform by comparing the set stop position of the mold platform with the execution position of the mold platform detected by the position detecting unit. Control to stop and fix each loading platform at any set position with respect to the cart and the moving speed of the loading platform for the mold Characterized in that and it is possible to control the operation timing.

  (4) The mold changing device of the second type mounting injection molding machine of the fourth means is the mold changing device of the second type mounting injection molding machine of the first means or the second means. Further, by communicating with the control device of the two-mold injection molding machine, the two sets of mold platen positions of the molding machine are read, and the positions of the mold plates and the molds are fixed on the exchange carriage. After calculating each stop position of the mold exchanging carriage that can carry in and out of each mold from the mold loading platform on the mold exchanging carriage to the injection molding machine. And a control device capable of controlling the mold exchanging carriage to be sequentially stopped at the calculated stop positions after being moved by the moving means, and to carry in and out the plurality of molds. It is characterized by that.

  (5) A mold changing apparatus for a two-type mounting injection molding machine according to a fifth means is a mold changing apparatus for a two-type mounting injection molding machine according to the third means, wherein the control device is further used for each mold. With respect to the loading platform, two sets of mold platen positions of the molding machine are read by communication with the control device of the two-type mounting injection molding machine, and the position of each mold platen and the stop position of the mold exchanging carriage are determined. In comparison, a stop position on the mold exchanging carriage of each mold carriage that can be carried in and out of the mold from each mold exchanging carriage on the mold exchanging carriage. After the calculation, there is provided a control device capable of automatically setting, moving each of the loading platforms by the moving means, stopping and fixing at each calculated stop position, and controlling the mold to be carried in and out. It is characterized by that.

  (6) The mold changing device for the two-type mounting injection molding machine of the sixth means is the same as the mold changing device for the two-type mounting injection molding machine of the fifth means. It is characterized by having a control device that enables selection of simultaneous or sequential movement of the mold exchanging carriage.

According to the first aspect of the present invention, when the mold of the two-mold mounting injection molding machine is replaced, the mold exchanging carriage reciprocates between the injection molding machine and the mold preparation warehouse each time one mold is replaced. Both the time and the mold re-loading work time in the warehouse are required. In the present invention, the round-trip time of the carriage is provided by providing at least one empty loading platform and two or more update mold loading platforms. This eliminates the need for both the mold re-loading work time, significantly reduces the stop time due to mold replacement of the injection molding machine, and simultaneously mounts replacement molds for multiple molding machines. Therefore, it is possible to shorten the time required for mold re-loading in the warehouse.

  The invention according to claim 2 is the mold exchanging carriage for the two-type mounting injection molding machine, comprising a plurality of four or more renewal mold loading platforms whose mold intervals can be adjusted in advance. By using two or more mold loading platforms each, two sets of used molds can be carried in at the same time or with a slight time difference, and two sets of renewal molds can be set at the same time or a little time difference The mold can be exchanged in about half the time of the sequential mold exchange, and the stop time due to the mold exchange of the injection molding machine can be further shortened. Since the replacement mold for the machine can be placed at the same time, it is possible to shorten the time for the mold re-loading work in the warehouse.

According to a third aspect of the present invention, there is provided a mold platen (rotary mold platen) when the thickness of each used mold differs from the thickness of each of the renewal molds when the molds of the two-type mounting injection molding machine are replaced. And the movable mold platen) are stopped at an arbitrary position for mold thickness adjustment, the mold loading platform straddling the slave rail on the mold exchanging carriage is moved by automatic control and mounted. The placed mold can be quickly and accurately adjusted to the set arbitrary stop position, and there is an effect that the mold can be quickly replaced.
Further, even if the stop position accuracy of the mold exchanging cart is low, the mold stop position can be controlled by the fine position adjusting operation of the mold loading platform, which contributes to quick mold exchanging.
Furthermore, since the moving stroke of the mold carrier can be small, the position sensor for control is also small, and there is an effect that the equipment cost of the control system can be suppressed.

  The invention according to claim 4 and claim 5 relates to the mold replacement of the two-mold injection molding machine, and the adjustment of the stop position of the mold loading platform by the difference in thickness between the molds to be replaced. It is grasped as accurate data by communication with the control panel of the machine, processed accurately by a small computer in the control device, and the mold position where each mold can be taken in and out of the injection molding machine By automatically adjusting, there is an effect that a smooth mold exchanging operation can be executed without affecting the work process or the worker. In particular, the invention according to claim 5 can further finely adjust the stop position on the mold change carriage of the mold loading platform that is optimal with respect to the stop position of the mold platen of the molding machine, further reducing the work time for changing the mold. it can.

  According to a sixth aspect of the present invention, the mold replacement of the two-type mounting injection molding machine according to the fifth aspect is performed simultaneously or sequentially with the movement of each mold carrier and the movement of the mold replacement carriage. By making it selectable, it is possible to flexibly cope with the situation of the mold exchange and to improve the efficiency of the mold exchange.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view showing a typical positional relationship between a two-type injection molding machine and a mold exchanging carriage provided with four mold loading platforms capable of exchanging two sets of molds simultaneously. Processes (a) to (e) in FIGS. 2-1 to 2-2 are schematic plan views illustrating, in order, processes for simultaneously exchanging two mold sets.
In the illustration of the mold in the figure, the first mold is “mold (1)”, the second mold is “mold (2)”, and the third mold is “mold (3)”. The fourth mold is abbreviated as “mold (4)” (the same applies to the second and third embodiments).

In FIG. 1, a mold (1) is clamped between a stationary mold plate 11 and a rotary mold plate 20 of a two-type mounting injection molding machine (hereinafter also simply referred to as “injection molding machine”) 10. A mold (3) is clamped between the other surface of the rotary mold plate 20 and the movable mold plate 30, and a mold clamping device 12, a tie bar 13 and a split nut incorporated in the fixed mold plate 11. 14, the movable mold platen 30 is clamped in the direction of the fixed mold platen 11 with the rotary mold platen 20 interposed therebetween. Therefore, the molds (1) and (1) clamped between the mold plates 11, 20, 30 ( 3) is tightened together.
When the molds (1) and (3) are updated, clamps (not shown) that fix the molds (1) and (3) to the mold plates 11, 20, and 30 are opened, and the mold clamping is performed. The apparatus 12 and the split nut 14 are opened, and the movable mold board opening / closing apparatus 40 and the rotary mold board opening / closing apparatus 50 are driven, so that the distance between the rotary mold board 20 and the fixed mold board 11 is larger than the thickness of the mold (1). It operates so that it slightly increases, and it operates so that the distance between the rotary mold 20 and the movable mold 30 is slightly larger than the thickness of the mold (3). As the distance increases, the molds (1) and (3) are supported by a mold delivery roller (not shown) provided on the mold platen 11, the rotary mold platen 20, and the movable platen 30 and stand by. To do.

The mold exchanging carriage 1 is a self-propelled carriage that travels along a guide rail 2 that is a guideline that is disposed in parallel with the two-type mounting injection molding machine 10 and stops at a predetermined place. On the upper surface of the carriage, there are provided four sets of mold loading platforms 1a, 1b, 1c and 1d provided with means (not shown) for carrying out and carrying the molds to and from the injection molding machine. In FIG. 1, the mold exchanging trolley 1 loads the renewal molds (2) and (4) on the mold loading platforms 1c and 1d in a mold preparation warehouse (not shown), and the remaining two sets. The mold loading platforms 1a and 1b are empty loading platforms (indicated by circles) and are prepared as spaces for accommodating the used molds (1) and (3), and approach a predetermined position on the side surface of the injection molding machine. is doing.
In the following, “carrying out” means transferring the mold fixed to the injection molding machine 10 to the mold exchanging carriage 1, and “carrying in” means that the mold on the mold exchanging carriage 1 is transferred. It means to transfer to the injection molding machine 10.
Thereafter, the mold exchanging cart 1 is decelerated and slowed under the control of a cart control system (not shown) at a position where the empty cargo bed (indicated by a circle) matches the pair of left and right free roller conveyors 60L and 60R. Stopped and locked, and enters into the simultaneous unloading state of the used dies (1) and (3) by the dies unloading means.

  In FIGS. 2-1 to 2-2, steps (a) to (e) are performed in the order of the steps of simultaneously exchanging two sets of molds of a two-type injection molding machine using the mold exchanging carriage. The mold exchanging method and the control mode of the carriage will be described based on the schematic plan view shown in FIG. Here, in the following steps, the mold exchange and the control of the carriage are controlled by a control device (not shown).

In step (a) of FIG. 2-1, two sets of renewal molds (2) and (4) with the mold interval adjusted in advance are placed, and the remaining two sets of loading platforms are empty (marked with a circle). In the display, the mold exchanging carriage 1 that has been self-propelled from a mold preparation warehouse (not shown) is guided by a guide rail 2 and mounted with two sets of molds (1) and (3). This is where the molding machine 10 enters the side surface.
Since the placed molds (2) and (4) have a large weight and the weight of the mold exchanging carriage 1 for conveying the mold also becomes large, the carriage having a large inertia is used in the injection molding machine. The vehicle is decelerated as it approaches the side surface 10, and is controlled by the control device so as to reduce the impact at the time of stop and ensure the stop position accuracy.

In the step (b) of FIG. 2-1, the mold exchanging carriage 1 stops and locks two sets of empty cargo platforms (marked with ○) at a position directly beside the used molds (1) and (3). The used mold (1), (1), which is operated on the mold delivery roller (not shown) attached to the empty carrier, is released from the clamp, and waits on the mold delivery roller. 3) shows a state in which a pair of free roller conveyors 60L and 60R are simultaneously carried out to an empty carrier.
The free roller conveyors 60L and 60R, which are means for carrying out and carrying in the mold, are fixedly installed on the floor.

  In the step (c) of FIG. 2-1, when the mold exchanging carriage 1 carries out the used molds (1) and (3) and is accommodated in the empty cargo bed, the position is locked. The state until the released molds (2) and (4) that have been released and placed are moved right next to the space after the used molds (1) and (3) are removed is shown. . The die change cart 1 is accelerated, moved at a constant speed, and decelerated under the careful control of the control device of the cart control system, and is stopped at a predetermined position.

  In the step (d) of FIG. 2-2, the renewal molds (2) and (4) are positioned right next to the space after the used molds (1) and (3) are taken out. The mold exchanging carriage 1 is stopped, locked, and the loading means attached to the cargo bed is operated, and the renewal molds (2) and (4) are moved through the free roller conveyor. It shows the state of being brought into the space.

  The process (e) of FIG. 2-2 shows a state in which the mold exchanging carriage 1 that has exchanged two sets of molds at the same time starts the side of the injection molding machine 10 and heads to the mold preparation warehouse. Show.

  Further, even when the mold thickness changes before and after the replacement, even when the mold platen position of the injection molding machine 10 is stopped at an arbitrary position, the mold exchange cart 1 suitable for exchanging the mold with respect to the mold platen position. In order to obtain the stop position of the mold, the position data of the mold platen is taken from the control device of the injection molding machine 10 into the control device of the mold change cart 1 by communication, and the stop position of the mold change cart 1 optimum for the die change is determined. It is also possible to calculate and further stop control of the die change cart.

  In the present embodiment, an example of simultaneous exchange using the mold exchanging carriage 1 on which four sets of molds (1) to (4) can be placed simultaneously has been shown. The operation contents are the same even when a mold exchanging carriage capable of simultaneously placing a plurality of four or more sets of molds is used in order to place the exchange molds on the molding machine at the same time.

  As described above, in this embodiment, the mold exchanging cart 1 includes at least one empty loading platform and two or more renewal mold mounting loading platforms, so that the reciprocation time of the cart and the die re-loading operation time can be reduced. Both are unnecessary, and there is an effect that the stop time due to the mold replacement of the injection molding machine 10 is greatly shortened. Furthermore, since the replacement molds for a plurality of molding machines can be placed simultaneously, the time for mold re-loading work in the warehouse can be shortened.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.
The second embodiment is different from the first embodiment in that the mold exchange is performed sequentially one by one and that the carriage for the mold on the mold exchange carriage is three sets. It is a system.
The aim of the second embodiment, which features sequential mold exchange, is to change the setting of the carriage control system even if the thickness of each of the two sets of molds changes before and after the exchange, so that the mold exchange carriage 1 By changing the stop position, it is possible to easily cope with this, and the mold exchanging carriage and the control system are relatively inexpensive.
The second embodiment will be described below with reference to the drawings. Steps (A) to (L) in FIGS. 3-1 to 3-3 are schematic plan views showing, in order, steps of sequentially exchanging two sets of molds.

In step (a) of FIG. 3-1, two sets of renewal molds (2) and (4) are placed, and the remaining one set of loading platforms is empty (indicated by a circle), and the mold is prepared. The mold exchanging carriage 1 that has been self-propelled from a warehouse (not shown) is guided by the guide rail 2 and enters the side of the injection molding machine 10 equipped with two sets of molds (1) and (3). I'm about to do it.
Since the placed molds (2) and (4) have a large weight and the weight of the mold exchanging carriage 1 that conveys the mold also increases, the carriage having a large inertia is provided on the side surface of the injection molding machine. The vehicle is decelerated as it approaches, and is controlled so as to reduce the impact at the time of stopping and ensure the accuracy of the stopping position.

In the step (b) of FIG. 3-1, the mold exchanging carriage 1 is stopped and locked at a position where a set of empty cargo beds (marked with a circle) is directly next to the used mold (3). The used mold (3) that has been released from the clamp and opened on the mold delivery roller is operated by operating a mold unloading means (not shown) attached to the empty loading platform. The state which carries out to the loading platform over the free roller conveyor 60L of the side is shown.
The free roller conveyors 60L and 60R are fixedly installed on the floor.

  In the step (c) of FIG. 3-1, when the mold exchanging carriage 1 carries out the used mold (3) and is accommodated in the empty cargo bed, the position is unlocked and placed. The state until the said update metal mold | die (4) is moved to the side of the space between mold boards after a used metal mold | die (3) is removed is shown. The die change cart 1 is accelerated, moved at a constant speed and decelerated under the precise control of the control device of the cart control system, and is stopped at a predetermined position.

  In the step (d) of FIG. 3-2, the renewal mold (4) is located next to the space between the mold plates after the used mold (3) is removed. Is stopped, locked, and the loading means attached to the loading platform is operated to bring the renewal mold (4) into the space via the free roller conveyor 60L. .

In the step (e) of FIG. 3-2, the mold exchanging carriage 1 that has finished loading the renewal mold (4) arrives at the position next to the used mold (1) with the empty loading platform (marked with a circle). Therefore, it shows a state where it is unlocked and it is going to enter a constant speed movement from acceleration.
After that, the mold exchanging cart is decelerated by the command of the cart control system control device, controlled from slow running to fine movement, and when the empty loading platform (marked with a circle) reaches the side of the mold (1), It stops immediately and is locked.

  In the step (f) of FIG. 3-2, the mold unloading means attached to the empty carrier is operated, and the used mold (1) that has been waiting is exchanged via the free roller conveyor 60R. The state which carries out to the empty carrier of the trolley | bogie 1 is shown.

  In step (g) of FIG. 3C, when the mold exchanging carriage 1 carries out the used mold (1) and is accommodated in the empty loading platform, the position is unlocked and loaded. The state until it moves the said update metal mold | die (2) set | placed to the space | interval between the mold boards after a used metal mold | die (1) is removed is shown right. The die change cart 1 is accelerated, moved at a constant speed and decelerated under the precise control of the control device of the cart control system, and is stopped at a predetermined position.

  Step 3-3 in FIG. 3C is a mold exchanging carriage 1 at a position where the renewal mold (2) is directly next to the space between the molds after the used mold (1) is removed. Is stopped, locked, and when the position adjustment of the rotary mold platen 20 and the movable mold platen 30 is completed, the loading means attached to the loading platform is operated to pass through the free roller conveyor 60R. And the state which carries in the update metal mold | die (2) in the said space is shown.

Step 3-3 in FIG. 3C is that the mold exchanging carriage 1 that sequentially replaces two sets of molds starts the side of the injection molding machine 10 and goes to a mold preparation warehouse (not shown). Indicates the state of self-running. At this time, the sequential replacement process of the two sets of dies is completed.
In the simultaneous replacement method of the two sets of molds described in the first embodiment, when the thickness of the mold to be updated is different from the thickness of the used mold, the update mold on the mold replacement carriage is used. If the adjustment of the interval is wrong or the mold change operation is started without adjustment, the mold cannot be changed at the same time, but the control method of the mold change cart system is switched to the sequential change method of the second embodiment. Thus, it is possible to exchange two sets of molds while avoiding the heavy work that requires manual labor.

  Further, even when the mold thickness changes before and after the replacement, even when the mold platen position of the injection molding machine 10 is stopped at an arbitrary position, the mold exchange cart 1 suitable for exchanging the mold with respect to the mold platen position. In order to obtain the stop position of the mold, the position data of the mold platen is taken from the control device of the injection molding machine 10 into the control device of the mold change cart 1 by communication, and the stop position of the mold change cart 1 optimum for the die change is determined. It is also possible to calculate and further stop control of the die change cart.

  In the present embodiment, the mold exchanging carriage 1 shows an example of exchanging using a mold exchanging carriage capable of mounting three sets of molds at the same time. However, an exchange mold for a plurality of molding machines is used. The operation contents are the same even when a mold exchanging carriage capable of placing three or more sets of molds at the same time is used for simultaneous placement.

(Third embodiment)
Next, a second embodiment will be described with reference to FIGS.
In the third embodiment, the difference from the first embodiment is that all the mold loading platforms 1a to 1d can move independently on the guide rail 2a on the mold exchanging carriage, and That is, the stop position can be controlled. With this configuration, each mold load table can be adjusted to a corresponding position in advance and automatically in response to changes in the position of the mold platen in order to correspond to renewal molds having different thicknesses. Two sets of molds can always be exchanged at the same time.

  The third embodiment will be described below with reference to the drawings. Steps (a) to (g) of FIGS. 4-1 to 4-3 are steps of simultaneously exchanging two sets of molds when the thickness of the mold before replacement and the thickness of the mold to be updated are different. It is the model top view shown in order.

In step (a) of FIG. 4-1, two sets of renewal molds (2) and (4) are placed, and the remaining two sets of loading platforms are empty (marked with a circle). The mold exchanging carriage 1 that has been self-propelled from (not shown) is guided by a guide rail and enters the side of an injection molding machine equipped with two sets of molds (1) and (3).
The cart, which is large in both weight and inertia, decelerates as it approaches the side surface of the injection molding machine 10, becomes a slow speed in order to reduce the impact at the time of stopping, approaches the stop position, and stops at the specified position with little impact. To be controlled.

  In the step (b) of FIG. 4-1, the mold exchanging carriage stops at a position where two sets of empty loading platforms (circles) are brought close to the used molds (1) and (3). While locking, actuating the moving means and automatic control means of the empty carrier (○ mark), after performing fine adjustment of the position by an arbitrary moving speed and operation timing, actuate the mold unloading means, The state which unloads said used metal mold | die (1) and (3) is shown.

In step (c) of Fig. 4-2, the mold exchanging carriage that has received the used molds (1) and (3) in the loading platform unlocks the stop position and starts to move, and then is loaded on the loading platform. The state is shown in which the renewal molds (2) and (4) placed are directed to the side of the space between the molds after the used molds (1) and (3) are removed.
The mold exchanging cart 1 has a total of four molds, two sets of used molds and two sets of renewal molds. Therefore, the weight / inertia is large. It is necessary to carefully control the deceleration, timing, etc., and to prevent impact and overshoot of the stop position as much as possible to ensure position accuracy.

  In the step (d) of FIG. 4-2, the mold exchanging carriage 1 has the position of the renewal mold (2), the fixed mold platen side mold space (the used mold (1) has been removed). Stops and locks at a position that coincides with the space between the subsequent mold space), and the mold opening device is actuated by a command from the control device of the injection molding machine 10 so that the movable mold plate 30 and the rotary mold plate 20 are moved. The state of moving to a position (in the direction of the fixed mold plate 11 for both the movable mold plate 30 and the rotary mold plate 20) adapted to the thickness of the update mold (both two sets become thin molds) is shown.

In the step (e) of FIG. 4-3, after the position adjustment of the movable mold plate 30 and the rotary mold plate 20 is completed, the mold loading platform on which the update molds (2) and (4) are placed is It shows a state in which the position is finely adjusted by moving independently at an arbitrary moving speed and operation timing.
The fine adjustment of the position of the mold carrier is performed by a command from the control device of the mold exchanging cart system, and the position of the cargo bed and the space between the mold plates into which the update mold is fed are determined. The position of each mold platen read by communication with the control device of the injection molding machine 10 and the position of the corresponding mold loading platform are matched so that they match within the allowable gap range. The moving means of the loading platform is strictly driven by numerical control based on the calculation of a small electronic computer.

  Step (f) in FIG. 4-3 is attached to the loading platform after the fine adjustment of the loading platform position on which the renewal molds (2) and (4) are placed and the loading platform is stopped and locked. It shows a state in which the transfer means (2) and (4) are simultaneously transferred to the injection molding machine 10 side via the free roller conveyors 60L and 60R by driving the input means.

  Step (g) in FIG. 4-3 shows a state in which the mold exchanging carriage 1 that has finished exchanging two sets of molds at the same time is stopping and releasing the lock and is going to start the side of the injection molding machine. ing. At this point, the simultaneous replacement process of the two sets of dies is completed.

  In the present embodiment, the mold exchanging cart is an example of simultaneous exchanging using the mold exchanging cart 1 capable of simultaneously mounting four sets of molds. However, an exchange die for a plurality of molding machines is used. The operation contents are the same even when a mold exchanging cart capable of simultaneously mounting a plurality of molds of four or more sets is used for simultaneous mounting. In addition, when a mold exchanging carriage capable of simultaneously placing three or more sets of molds is used, a sequential exchanging operation can be performed.

  In addition, the movement of each mold carrier and the movement of the mold exchanging carriage for the purpose of shortening the mold exchanging time are completed simultaneously, or the movement of the mold exchanging carriage is completed to improve the control accuracy in the mold exchanging. It is also possible to carry out an efficient mold exchange process by selecting either the movement of each mold carrier or the sequential movement of the mold exchanging carriage so that the mold carrier is moved later. .

  As described above, the mold exchanging device of the two-type mounting injection molding machine according to the present invention is a two-material injection molding machine that mounts two molds: a mold on the movable mold side and a mold on the fixed mold side. With regard to die replacement of a stack mold molding machine or the like, in particular, two sets of die can be exchanged in a short time, which is suitable for use in a self-propelled die changer.

Typical positional relationship between a two-mold mounting injection molding machine according to the first embodiment of the present invention and a mold exchanging carriage equipped with four mold loading platforms capable of exchanging two sets of molds simultaneously. It is a schematic plan view which shows. It is the model top view which showed the process of replacing | exchanging two metal mold | die sets simultaneously in order. It is the model top view which showed the process of replacing | exchanging two metal mold | die sets simultaneously in order. It is the model top view which showed the process of replacing | exchanging two metal mold | die sets based on the 2nd Embodiment of this invention sequentially. It is the model top view which showed the process of replacing | exchanging two metal mold | die sets based on the 2nd Embodiment of this invention sequentially. It is the model top view which showed the process of replacing | exchanging two metal mold | die sets based on the 2nd Embodiment of this invention sequentially. When the thickness of the mold before replacement according to the third embodiment of the present invention is different from the thickness of the mold to be renewed, the two molds are set at the same time, or a slight time difference is applied to alleviate the impact. It is the schematic top view which showed the process to attach and replace in order. When the thickness of the mold before replacement according to the third embodiment of the present invention is different from the thickness of the mold to be renewed, the two molds are set at the same time, or a slight time difference is applied to alleviate the impact. It is the schematic top view which showed the process to attach and replace in order. When the thickness of the mold before replacement according to the third embodiment of the present invention is different from the thickness of the mold to be renewed, the two molds are set at the same time, or a slight time difference is applied to alleviate the impact. It is the schematic top view which showed the process to attach and replace in order.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold change cart 1a-1d Mold loading platform 2 Guide rail 10 Two mold mounting injection molding machine 11 Fixed mold board 12 Clamping device 13 Tie bar 14 Split nut 20 Rotary mold board 30 Movable mold board 40 Movable mold board opening and closing device 50 Rotary platen opening and closing device 60L Free roller conveyor 60R Free roller conveyor (1), (3) Used mold (2), (4) Renewal mold 〇 Empty loading platform

Claims (7)

In a two-type injection molding machine with two sets of molds,
A moving means that can move along a guideline disposed in parallel and close to the molding machine, and a plurality of loading platforms that can simultaneously mount at least three sets of molds
Means for carrying out and carrying in the mold with the adjacent molding machine attached to all of the loading platforms, and at least one loading platform among the plurality of loading platforms is empty, and is not empty On the loading platform, a self-propelled mold exchanging cart that can place an update mold,
After moving the mold exchanging carriage so that the empty loading platform of the self-propelled mold exchanging carriage is removed from the molding machine and beside the used first mold held between the molds, Next, after the used first mold is carried out to the empty cargo bed by the loading / unloading means provided in the loading platform, the mold exchanging carriage is moved, and the renewal die that has been placed is replaced with the first mold. It has a control device which can be controlled to carry in the space between the molds after removing the molds, and to apply the above-described process to the second mold and to sequentially exchange the molds. A mold exchanging device for a two-mold mounting injection molding machine. In a two-type injection molding machine with two sets of molds,
A moving means that can be moved along a guideline that is close to and parallel to the molding machine, and a plurality of loading platforms that can simultaneously mount four or more sets of molds;
Means for carrying out and carrying in the mold with the adjacent molding machine attached to all of the loading platforms, and among the plurality of loading platforms, at least two loading platforms are empty and other non-empty other A self-propelled mold exchanging trolley capable of placing a renewal mold on each of a plurality of sets of loading platforms,
After moving the mold exchanging carriage so that the empty loading platform is removed from the molding machine and beside the two sets of used molds held between the molds, then the loading / unloading means provided in the loading platform After the two sets of used molds removed from the injection molding machine at the same time or with a slight time difference to prevent impact, the mold change cart is moved after being carried out to the empty loading platform. In the process of carrying in the space between the molds after removing the two sets of molds at the same time or with a slight time difference to prevent impact, the two sets of update molds that have been placed, A mold changing device for a two-type injection molding machine, characterized by having a control device that can be controlled to perform simultaneous two-type changing. In the mold changing apparatus of the two-mold mounting injection molding machine according to claim 1 or 2,
The mold exchanging carriage is further moved on the mold exchanging carriage in a horizontal direction on the mold exchanging carriage. Thereafter, the mold loading platform moving means capable of being stopped and fixed, and a position detecting means for detecting an arbitrary position of the mold loading platform on the mold changing carriage, the control device, Further, the mold loading platform has a stop position setting means, and the setting stop position of the mold loading platform is compared with the execution position of the mold loading platform detected by the position detection means, and the mold loading platform is compared. The mold of the injection molding machine with two molds can be controlled to stop and fix each cargo bed at an arbitrary set position with respect to the mold exchanging cart, and to control the moving speed and operation timing of the mold cargo bed. Mold changer. In the mold changing apparatus of the two-mold mounting injection molding machine according to claim 1 or 2,
The control device further reads two sets of mold platen positions of the molding machine through communication with a control device of a two-type injection molding machine, and the positions of the mold plates and the molds are the exchange carriage. Comparing the positions fixed above, each stop of the mold exchanging carriage that can carry in and out of each mold from the mold loading platform on the mold exchanging carriage to the injection molding machine After calculating the position, the mold exchanging carriage is moved by the moving means, and is successively stopped at the calculated stop positions, and a plurality of molds can be controlled to be carried in and out. A mold exchanging device for a two-type mounting injection molding machine, comprising a control device. In the mold changing apparatus of the two-type mounting injection molding machine according to claim 3,
The control device further reads each set of platen positions of the molding machine by communicating with the control unit of the injection molding machine of the two molds for each mold carrier, Compared with the stop position of the mold exchanging carriage, the mold excavator can be loaded and unloaded from the mold exchanging carriage on the mold exchanging carriage to the injection molding machine. After calculating the stop position on the mold exchanging carriage, it is automatically set, and the loading platform is moved by the moving means, stopped and fixed at the calculated stop position, and controlled to carry in and out the mold. A mold exchanging device for a two-mold mounting injection molding machine, comprising a control device capable of performing the above. In the mold changing apparatus of the two-type mounting injection molding machine according to claim 5,
A mold changer for a two-mold injection molding machine, characterized by having a control device that enables selection of simultaneous movement or sequential progression of movement of each mold carrier and movement of the mold exchange carriage. In the mold changing apparatus of the two-type mounting injection molding machine according to any one of claims 1 to 5,
A mold changer for a two-mold injection molding machine, wherein the two-mold injection molding machine for mounting two sets of molds is a mold-reversed two-material molding machine or a stack mold molding machine.

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