JP2017071161A - Setup method for mounting mold in toggle type injection molding machine and toggle type injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a setup method for mounting a mold in a toggle type injection molding machine achieved in a short time.SOLUTION: Provided is a method structured as a setup method for mounting a mold in a toggle type injection molding machine (1) in which the mold is opened and closed by driving a cross head (12) and positions of a mold clamping housing (7) can be adjusted by driving a tie-bar nut provided to a tie bar (9). Regarding a plurality of molds, each of the molds and set housing positions of the respective molds are stored in a controller (26) in an associated manner. The set housing position is a position of the mold clamping housing (7) where a prescribed set mold clamping force can be acquired at a mold clamping completed position at which the cross head (12) stops at the time of mold clamping. When an arbitrary mold out of the plurality of molds is selected and mounted to a toggle type mold clamping device (3), the set housing position stored by being associated with the selected mold is acquired and the tie-bar nut is driven to adjust the mold clamping housing (7) to the set housing position.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a mold mounting setup method and a toggle type injection molding machine for mounting a mold by replacement etc. in a toggle type injection molding machine equipped with a toggle type mold clamping device. A mold mounting setup method for a toggle type injection molding machine that adjusts to a state where a desired mold clamping force suitable for molding can be obtained in preparation for start, and toggle type injection in which such mold mounting setup is performed It relates to a molding machine.

  As is well known in the art, an electric injection molding machine equipped with a toggle type mold clamping device includes a stationary platen fixed on a bed, a mold clamping housing slidably provided on the bed, a fixed platen and a mold clamping housing. 4 tie bars, a movable platen inserted through the tie bar, a toggle mechanism provided between the mold clamping housing and the movable platen, and the like. A toggle mechanism is also well known, and is composed of a crosshead and a plurality of toggle links. This cross head is provided with a ball nut, and the ball screw screwed to the ball nut is driven to rotate by a mold opening / closing motor. In other words, the crosshead is driven in the axial direction by the mold opening / closing motor, and the toggle mechanism is expanded and contracted to drive the movable plate in the axial direction with respect to the mold clamping housing. Such a mold opening / closing motor is composed of a servo motor, and the position of the crosshead can be accurately controlled.

  Incidentally, the tie bar is coupled to the mold clamping housing as follows. That is, through holes are formed in the mold clamping housing, and tie bars are inserted into the respective through holes. Male threads are formed at the ends of the inserted tie bars, and tie bar nuts are screwed into the male threads. These tie bar nuts are rotatably provided in a state in which the forward / backward movement is restricted with respect to the mold clamping housing. Since the tie bar is thus coupled to the mold clamping housing, the position of the mold clamping housing relative to the stationary platen can be adjusted by rotating the tie bar nut. That is, the connection length between the fixed platen and the mold clamping housing, that is, the effective length of the so-called tie bar can be adjusted, and thereby the distance between the fixed platen and the movable platen, that is, the mold thickness can be adjusted. The tie bar nut can be rotated synchronously by a mold thickness adjusting motor, and the mold thickness adjusting motor is generally composed of a geared motor.

  By the way, the mold clamping process is carried out by driving the cross head with a mold opening / closing motor. Strictly speaking, the first half of the process until these molds touch and the tie bar elastically deform after touching, thereby clamping the mold. It can be divided into the latter half of the process where force is generated. When the mold clamping process is completed, that is, when the latter half of the process is completed, the crosshead position is set to a predetermined mold clamping completion position, for example, 0, and injection molding is performed at this mold clamping completion position. Is different depending on the mold. Therefore, it is necessary to adjust the crosshead position when the mold touches with the mold so that an optimum mold clamping force is generated when the crosshead position is at the mold clamping completion position. Such adjustment is called mold clamping force adjustment. The mold clamping force is adjusted by adjusting the position of the mold clamping housing, and is adjusted by driving a mold thickness adjusting motor. Then, at first glance, mold thickness adjustment and mold clamping force adjustment seem to be the same concept. However, if there are two sets of molds that can be exchanged and the required clamping force is different for each, even if the mold thicknesses of the two sets of molds are exactly the same, the clamping force can be adjusted. The location of the mold clamping housing obtained later should be different in the two sets of molds. Adjusting the position of the mold clamping housing considering only the mold thickness In mold thickness adjustment, the position of the mold clamping housing should be the same in the two sets of molds. It can be said that it is a different concept.

  In the present specification, the mold mounting setup means that the mold is replaced and ready for injection molding, but in the toggle type clamping device, the mold is replaced, This means that the mold clamping force is adjusted so that a desired mold clamping force appropriate for the mold can be obtained. A sequence program for automatically performing the mold mounting setup is built in the controller of the toggle type injection molding machine so that such mold mounting setup can be performed reliably and safely. The sequence program is configured to drive the toggle type mold clamping device in cooperation with the operator's work, but generally operates as follows. First, as shown in FIG. 4, the operator performs step X1 to remove the mold. That is, the toggle mold clamping device is closed, the clamped state of the attached mold is released, the toggle mold clamping device is opened, and the mold is removed. Next, the process X2 is performed, and the mold thickness of the mold to be attached and the mold clamping force to be set for the mold, that is, the set mold clamping force are input to the controller. The sequence program performs step X3. That is, the mold thickness adjustment motor is driven in the mold open state, and the mold thickness is adjusted so that the mold thickness is reduced by a predetermined thickness, for example, 5 mm, from the mold thickness input to the controller. The purpose of adjusting the mold thickness to reduce the mold thickness in this way is to ensure that the mold can be closed in the next step X4 for mounting the mold, which is performed by the operator. When the process X3 is completed, the operator performs the process X4 for attaching the mold. That is, the mold is carried in and then the mold is closed. The mold is then clamped on a toggle mold clamping device. Then open the mold. Next, the sequence program implements a mold clamping force adjustment step X5 including steps X5-1 to X5-4. First, in step X5-1, it is confirmed that the mold is surely touched by driving the mold opening / closing motor at a low speed. At this time, the sequence program can obtain the accurate mold thickness of the mold by reading the crosshead position when the mold touches. The mold opening / closing motor is driven to open the mold. The sequence program drives the mold thickness adjusting motor in step X5-2, and sets the mold thickness so that the mold thickness is increased by, for example, 5 mm so that the mold thickness is slightly larger than the accurate mold thickness obtained earlier. adjust. The reason why the mold thickness is adjusted to be slightly larger is to ensure that the mold does not touch when the mold is closed. The sequence program performs step X5-3. That is, the mold opening / closing motor is driven to a predetermined crosshead position. If the mold touches at the crosshead position, the crosshead position is set by a desired mold clamping force, that is, an operator input in the process X2 when the crosshead position reaches the completion position in the mold clamping process. Such a crosshead position is such that a clamping force can be obtained. Such a crosshead position is naturally different if the set clamping force is different. With the mold opening / closing motor stopped, that is, with the crosshead position fixed, the mold thickness adjusting motor is slowly driven to drive the mold clamping housing in the direction in which the mold thickness decreases. When the speed of the mold clamping housing becomes smaller than a predetermined value or when the current supplied to the mold thickness adjusting motor becomes larger than a predetermined value, it is determined that the mold has touched. The sequence program executes step X5-4 at this timing to stop the mold thickness adjusting motor. Complete the clamping force adjustment.

Japanese Patent Laid-Open No. 7-9524

  Patent Document 1 describes an injection molding machine in which a plurality of molds are automatically replaced. In this document, it is recommended that these molds are all manufactured to the same mold thickness. This is because if the mold thickness is the same, it is not necessary to adjust the mold thickness every time the mold is replaced. According to the literature, it is described that when molds with different mold thicknesses are exchanged, it is necessary to adjust the mold thickness after the mold exchange.

  The mold mounting setup can be performed by the sequence program as described above, and can be performed safely and reliably without damaging the mold. In other words, it can be said that it is safe and reliable. However, there is a problem to be solved with respect to such a mold mounting setup. Specifically, it can be said that it takes a long time to set up the mold. When the mold mounting setup is performed, the process X1 for removing the mold and the process X3 for mounting the mold to be replaced are indispensable processes, and the time required for these processes is inevitably required and omitted. Can not. However, there seems to be room for improvement to save time for other processes. In the toggle type injection molding machine of a predetermined model, when each of the process X1, the process X3, the process X4, and the process X5 is measured, it is 20 seconds, 30 seconds, 20 seconds, and 120 seconds, and 3 minutes and 10 seconds as a whole. I found that it was necessary. The 20 seconds required for the process X1 for taking out the mold and the 20 seconds required for the process X3 for attaching the mold cannot be omitted. However, if the time required for other processes can be saved, the setup of the mold is short. Should be done in time. If it does so, the cost required for shaping | molding can be made small. However, in the conventional sequence program, since it takes a long time to set up the mold, the molding cost is affected. As recommended in the patent literature, it may be possible to save time for setting up the mold by making the mold thickness the same in all the molds. However, this document does not give special consideration to the fact that the appropriate clamping force differs depending on the die, and hence the necessity of adjusting the clamping force for each die. While there are molds that require a large clamping force so that the mold does not open at the time of injection, such as a mold with a large cavity cross-sectional area, there is a risk of damage if a large clamping force is applied. The mold must be limited to a relatively small clamping force. In this case, it is necessary to adjust the clamping force so that an appropriate clamping force is given to each mold. Since this point is not described in Patent Document 1, it cannot be applied to a general mold mounting setup. In other words, the time required for mold mounting setup cannot be saved.

  An object of the present invention is to provide a mold mounting setup method and a toggle type injection molding machine that solve the above-described problems, and specifically, a toggle type injection equipped with a toggle type clamping device. A toggle-type injection molding machine that can perform a mold mounting setup in a short time so that a desired clamping force can be obtained by exchanging the mold in the molding machine, thereby reducing the cost required for molding. It is an object of the present invention to provide a mold mounting setup method and a toggle type injection molding machine in which such a mold mounting setup method is implemented.

  In order to achieve the above object, the present invention provides a toggle type injection molding machine in which a mold head is opened and closed when a toggle head of a toggle mechanism is driven, and a position of a mold clamping housing can be adjusted by driving a tie bar nut provided on a tie bar. It is configured as a mold mounting setup method. In this method, the controller stores a plurality of molds in association with each mold and a set housing position with respect to the mold. The set housing position is a position of the mold clamping housing where a predetermined set mold clamping force can be obtained at a mold clamping completion position where the crosshead stops at the time of mold clamping. When an arbitrary mold is selected from a plurality of molds and attached to the toggle type mold clamping device, the set housing position stored in association with the selected mold is obtained, and the tie bar nut is driven. Set the mold clamping housing to the set housing position.

Thus, in order to achieve the above object, the invention according to claim 1 connects the fixed platen, the movable platen, the mold clamping housing, and the fixed platen and the housing with the movable platen interposed therebetween. It consists of a tie bar and a toggle mechanism provided between the movable platen and the mold clamping housing, and when the crosshead of the toggle mechanism is driven, the mold is opened and closed, and a tie bar nut provided on the tie bar is driven. Then, in a toggle type injection molding machine equipped with a toggle type mold clamping device in which the position of the mold clamping housing is changed, a mold is attached to the toggle type mold clamping device to obtain a desired mold clamping force. A mold mounting setup method, wherein a plurality of molds are stored in association with each mold and a set housing position with respect to the mold. The position is a position of the mold clamping housing at which a predetermined set clamping force required for the mold can be obtained at a mold clamping completion position where the crosshead stops at the time of mold clamping, and any of the plurality of molds When the mold is selected and attached to the toggle type mold clamping device, the set housing position stored in association with the selected mold is obtained, and the tie bar nut is driven to drive the mold clamping. It is configured as a mold mounting setup method of a toggle type injection molding machine, wherein the housing is set to the set housing position.
According to a second aspect of the present invention, in the mold mounting setup method according to the first aspect, the setting housing position stored in association with the mold is determined in advance by performing a mold clamping force adjustment. The mold clamping force adjustment is such that the tie bar nut is driven to move the mold clamping housing in a state where the crosshead is at a predetermined set crosshead position, and the mold is stopped at a position where the mold touches, The set crosshead position is a crosshead position where the set mold clamping force can be obtained when the mold is touched at this position and the crosshead is moved to the mold clamping completion position. This is configured as a mold mounting setup method for a type injection molding machine.
According to a third aspect of the present invention, there is provided a fixed platen, a movable platen, a mold clamping housing, a tie bar connecting the fixed platen and the housing across the movable platen, the movable platen and the mold clamping. A toggle mechanism provided between the housing and the mold. When the crosshead of the toggle mechanism is driven, the mold is opened and closed, and when the tie bar nut provided on the tie bar is driven, the position of the mold clamping housing changes. A toggle-type injection molding machine having a toggle-type mold clamping device configured as described above, wherein a controller of the toggle-type injection molding machine includes a plurality of molds, each mold and a setting housing for the mold The setting housing position is a predetermined setting required for the mold at a mold clamping completion position where the crosshead stops at the time of mold clamping. The position of the mold clamping housing is such that a clamping force can be obtained, and when the arbitrary mold is selected from the plurality of molds and attached to the toggle type mold clamping device, the controller selects the selected mold A toggle-type injection molding machine characterized in that the set housing position stored in association with the position is acquired, and the tie bar nut is driven to move the mold clamping housing to the set housing position. Configured as
According to a fourth aspect of the present invention, in the toggle type injection molding machine according to the third aspect, the setting housing position stored in association with the mold is determined by performing mold clamping force adjustment in advance. The mold clamping force adjustment is performed when the tie bar nut is driven to move the mold clamping housing while the cross head is at a predetermined set cross head position, and the mold clamping touch is stopped. The set crosshead position is a crosshead position where the set mold clamping force can be obtained when the mold is touched at this position and the crosshead is moved to the mold clamping completion position. It is configured as a featured toggle type injection molding machine.

  As described above, the mold mounting setup method according to the present invention is intended for a general toggle type injection molding machine. That is, the toggle type injection molding machine includes a stationary platen, a movable platen, a mold clamping housing, a tie bar that connects the stationary platen and the housing with the movable platen interposed therebetween, and a movable platen and the mold clamping housing. Toggle type mold that consists of a toggle mechanism provided, which opens and closes when the crosshead of the toggle mechanism is driven, and changes the position of the clamping housing when the tie bar nut provided on the tie bar is driven Since it is a toggle type injection molding machine equipped with a fastening device, it is a general one. The present invention is configured as a mold mounting setup method in which a mold is mounted on a toggle mold clamping device in such a toggle injection molding machine so as to obtain a desired mold clamping force. Specifically, for each of a plurality of molds, each mold and a set housing position with respect to the mold are stored in association with each other, and the set housing position is a mold clamping completion position where the crosshead stops at the time of mold clamping In the mold clamping housing position at which a predetermined set clamping force required for the mold is obtained, and when an arbitrary mold is selected from a plurality of molds and attached to the toggle type mold clamping device, A stored set housing position associated with the selected mold is obtained and the tie bar nut is driven to bring the mold clamping housing to the set housing position. In other words, in the mold mounting setup of the present invention, it is not necessary to adjust the mold clamping force, which is necessary in the past, and when the mold clamping housing is moved by driving the tie bar nut, it is stored in advance for the mold to be mounted. It is only necessary to move to the position of the mold clamping housing, that is, the setting housing position. This is because the set mold clamping force required for the mold during mold clamping can be obtained simply by moving to the set housing position. Since the time required for adjusting the mold clamping force can be saved, the time required for mold mounting setup can be greatly reduced. This can reduce the cost of molding. According to another invention, the setting housing position stored in relation to the mold is determined by performing the mold clamping force adjustment in advance, and the mold clamping force adjustment is performed by setting the crosshead to a predetermined setting crosshead position. In this state, drive the tie bar nut to move the clamping housing so that it stops at the position where the mold touches, and the crosshead position is set when the mold touches at this position. In this position, the crosshead position is such that a set mold clamping force can be obtained. The mold clamping force at the time of mold clamping can be easily calculated considering the elastic deformation of the tie bar from the crosshead position touched by the mold and the mold clamping completion position at the time of mold clamping. When a set mold clamping force, which is a clamping force, is given, the crosshead position that the mold should touch, that is, the set crosshead position can be easily calculated. According to the present invention, since the crosshead is set to the set crosshead position obtained by such an easy calculation and only the position of the clamping housing touched by the mold is searched, the clamping force adjustment can be easily performed. Can be implemented. That is, it is possible to obtain an effect that it is easy to determine the setting housing position unique to the mold.

It is a figure which shows typically the toggle type injection molding machine which concerns on embodiment of this invention. It is a flowchart explaining the metal mold | die installation setup method which concerns on embodiment of this invention, Comprising: It is a flowchart explaining the case where the metal mold | die attached for the first time is attached. It is a flowchart explaining the metal mold | die installation setup method which concerns on embodiment of this invention, Comprising: It is a flowchart explaining the case where the metal mold | die attached previously is attached again. It is a flowchart explaining the conventional metal mold | die installation setup method.

  The toggle type injection molding machine 1 according to the present embodiment in which the mold mounting setup method according to the present embodiment is implemented includes a general toggle type injection molding machine as shown in FIG. That is, the toggle type injection molding machine 1 used in the present embodiment is also composed of the injection device 2 and the toggle type mold clamping device 3. As is well known in the art, the toggle type mold clamping device 3 includes a stationary platen 5, a movable plate 6 that is opened and closed with respect to the stationary platen 5, a mold clamping housing 7, and the movable platen 6. Are connected to the mold clamping housing 7 and a toggle mechanism 11 provided between the stationary platen 5 and the mold clamping housing 7. The toggle mechanism 11 is provided with a cross head 12 for driving the toggle mechanism 11, and a ball nut 13 is fixed to the cross head 12. A ball screw 14 is screwed onto the ball nut 13. The mold clamping housing 7 is provided with a mold opening / closing motor 16 composed of a servo motor, and the mold opening / closing motor 16 can accurately rotate the ball screw 14 by a desired rotation angle. When the ball screw 14 is rotated by driving the mold opening / closing motor 16, the crosshead 12 can be driven in the axial direction, the toggle mechanism 11 can be driven to open / close the mold, and the mold can be clamped. Although not shown in FIG. 1, the tie bars 9, 9,... Are connected to the mold clamping housing 7 as follows. That is, the tie bars 9, 9,... Pass through the mold clamping housing 7, and a male screw is formed in the inserted portion. A tie bar nut is screwed onto the male screw, and the tie bar nut is rotatably provided in a predetermined space in the mold clamping housing 7 in a state where movement in the axial direction is restricted. 1 shows the mold clamping housing 7 from the back side. Small pulleys 18, 18,... Are provided on the back side and are fixed to tie bar nuts not shown in the drawing. The small pulleys 18, 18,... Are engaged with a large pulley 19, and the large pulley 19 is driven by a mold thickness adjusting motor 20 comprising a geared motor. That is, when the mold thickness adjusting motor 20 is rotated, the tie bar nuts are rotated synchronously via the large pulley 19 and the small pulleys 18, 18,. Then, the mold clamping housing 7 moves and the effective length of the tie bars 9, 9,..., That is, the connection length between the stationary platen 5 and the mold clamping housing 7 can be adjusted. Thereby, the mold thickness between the fixed platen 5 and the movable platen 6 can be adjusted. A fixed-side mold 22 is attached to the stationary platen 5 of the toggle type mold clamping device 3 configured as described above, and a movable-side die 23 is attached to the movable platen 6.

  The toggle-type injection molding machine 1 according to this embodiment is also driven by a controller 26, and the mold opening / closing motor 16 and the mold thickness adjusting motor 20 are also connected to the controller 26 via signal lines. Yes. In such a controller 26, a file unique to the present invention, that is, a molding condition storage file 27 for each mold is provided. The mold-specific molding condition storage file 27 is a file in which different molding conditions are stored for each mold, and the mold mounting setup method according to the present embodiment uses the mold-specific molding condition storage file 27. I use it.

  A mold mounting setup method according to the present embodiment will be described. The implementation contents of the mold mounting setup according to the present embodiment differ between the mold that is first mounted to the toggle type mold clamping device 3 and the mold that is the second or later. First, a description will be given of a method for setting up a mold for a mold that is attached to the toggle type mold clamping device 3 for the first time.

When the mold is set up for the first time, the mold mounting setup is performed in a manner similar to the conventional mold mounting setup. First, as shown in FIG. 2, step S1 is first performed to remove the currently attached mold. That is, the mold opening / closing motor 16 is driven to close the toggle type mold clamping device 3 and release the clamp of the mold. Open the mold and remove the mold. Next, the operator performs step S2 and inputs the following data regarding the mold to be attached.
“Identification number” It is a number that identifies the mold.
“Mold thickness” This is the mold thickness.
“Set clamping force” is a clamping force appropriate for the mold.

  In step S3, the controller 26 drives the mold thickness adjusting motor 20 to move the mold clamping housing, and adjusts the mold thickness so as to be smaller than the input mold thickness by a predetermined amount, for example, by 5 mm. The purpose of adjusting the mold thickness so as to reduce the mold thickness in this way is to ensure that the mold is securely closed when the mold is mounted in the next step. Step S4 is performed with the mold opened. That is, the mold to be attached is carried into the toggle type mold clamping device 3 and the mold opening / closing motor 16 is driven to close the mold. Clamp the mold and install the mold. Open the mold.

The controller 26 performs the mold clamping force adjustment S5 for the attached mold. The mold clamping force adjustment S5 includes steps S5-1 to S5-4. First, in step S5-1, the mold opening / closing motor 16 is driven to close the mold, and it is confirmed that the mold touches reliably. At this time, the controller 26 detects the position of the cross head 12 when the mold touches, that is, the position of the cross head, and calculates an accurate mold thickness for the mold. Next, in step S5-2, the mold thickness adjusting motor 20 is driven to move the mold clamping housing 7, and the mold thickness is adjusted to a mold thickness slightly larger than the calculated mold thickness, for example, 5 mm. The purpose of making the mold thickness slightly larger in this way is to ensure that the mold does not touch when the mold is closed. Next, the controller 26 drives the mold opening / closing motor 16 to the next set crosshead position which is a predetermined crosshead position in step S5-3.
“Set crosshead position” It is such a crosshead position where when a mold touches at this crosshead position, a set mold clamping force is obtained at a mold clamping completion position where the crosshead stops at the time of mold clamping.
In this state, the mold thickness adjusting motor 20 is driven to slowly move the mold clamping housing 7 in the mold thickness decreasing direction. If the mold touches while moving the mold clamping housing 7 in this way, the mold thickness adjustment motor 20 is stopped in step S5-4 to complete the mold thickness adjustment. Note that the touch of the mold is determined by monitoring the current for driving the mold thickness adjusting motor 20 to become a predetermined magnitude, or by monitoring the moving speed of the mold clamping housing 7 to determine a predetermined speed. Judgment can be made based on the following.

When the mold clamping force adjustment S5 is completed, the controller 26 associates the data of the identification number, the set crosshead position, and the set mold clamping force with respect to the mold in the process S6 and stores them in the mold-specific molding condition storage file 27. Write. Also write the next set housing position.
“Set housing position” means the position of the mold clamping housing detected when the mold clamping force adjustment is completed.
For the mold to be mounted for the first time, the mold mounting setup is completed.

  With reference to FIG. 3, a method for performing a mold mounting setup according to the present embodiment for a mold that is attached to the toggle type mold clamping device 3 for the second time or later will be described. First remove the currently installed mold. That is, the mold is closed in step S11, the mold clamp is released in step S12, the mold is opened, and the mold is removed in step S13. Next, the operator carries out step S14 and inputs an identification number to the controller 26 for the mold to be mounted. The controller 26 searches the mold-specific molding condition storage file 27 and reads the set housing position and the set crosshead position stored in association with the input identification number. In step S16, the controller 26 determines whether or not the current position of the mold clamping housing 7 is the set housing position. If it is in the set housing position, the process proceeds to the next step S18. Otherwise, in step S17, the mold thickness adjusting motor 20 is driven to set the mold clamping housing 7 to the set housing position.

  Install the mold. That is, in step S18, the mold is carried in with the toggle type mold clamping device 3 opened, and the mold is closed. And a metal mold | die is clamped by process S19. That is, a mold is attached. Next, the mold opening / closing motor 16 is driven so that the mold is touched. In step S20, it is confirmed whether or not the crosshead position at this time coincides with the set crosshead position read in step S15. Whether or not they match may be determined as including a predetermined error. If they match, the mold mounting setup is completed. Originally, the mold attached this time is the same as the mold that has been installed before, so it should naturally match. Accordingly, it is not necessary to perform mold clamping adjustment which is necessary in general mold mounting setup, and the time required for this, for example, 120 seconds can be saved. However, there are rare cases where they do not match due to changes in the temperature of the mold. If they do not coincide, the mold clamping force adjustment in step S21 is performed. Step S21 includes steps S21-1 to S21-3. First, after opening the mold opening / closing motor 16 and opening the mold in step S21-1, the mold thickness adjusting motor 20 is driven to slightly increase the mold thickness. . That is, the mold thickness is set so that the mold does not touch when the mold is closed. Next, in step S21-2, the mold opening / closing motor 16 is driven to bring the crosshead to the set crosshead position. In this state, the mold thickness adjusting motor 20 is driven to move the mold clamping housing 7 slowly in the mold thickness decreasing direction. When it is detected that the mold has touched, the mold thickness adjusting motor 20 is stopped to complete the mold clamping force adjustment. The controller 26 reads the position of the mold clamping housing 7 at this time, updates the set housing position, and rewrites the set housing position stored in association with the mold in step S22. The mold mounting setup according to the present embodiment is completed.

  The mold mounting setup method according to the present embodiment can be variously modified. For example, the mold clamping force adjustment in step S5 and step S21 may be performed by other methods. Specifically, it is determined whether or not the required set clamping force can be obtained by actually performing the mold clamping. If not, the mold is opened, the mold clamping housing position is adjusted, and the mold clamping is performed again. To confirm. The mold clamping force can be adjusted by repeating such adjustment. The mold-specific molding condition storage file 27 can also be changed, and although not described in the above description, various molding conditions relating to the injection process may be stored as data.

DESCRIPTION OF SYMBOLS 1 Toggle type injection molding machine 2 Injection device 3 Toggle type clamping device 5 Fixed platen 6 Movable platen 7 Clamping housing 9 Tie bar 11 Toggle mechanism 12 Cross head 14 Ball screw 16 Mold opening / closing motor 20 Mold thickness adjustment motor 22 Fixed side die 23 Movable mold 26 Controller 27 Molding condition storage file by mold

Claims (4)

A fixed platen, a movable platen, a mold clamping housing, a tie bar connecting the fixed platen and the housing with the movable platen interposed therebetween, and the movable platen and the mold clamping housing. A toggle mechanism that opens and closes when the crosshead of the toggle mechanism is driven, and changes the position of the mold clamping housing when the tie bar nut provided on the tie bar is driven. In a toggle type injection molding machine equipped with a device, a mold mounting setup method for mounting a mold to the toggle type clamping device to obtain a desired clamping force,
For a plurality of molds, each mold and a set housing position with respect to the mold are stored in association with each other,
The set housing position is a position of the mold clamping housing at which a predetermined set mold clamping force required for the mold is obtained at a mold clamping completion position where the crosshead stops at the time of mold clamping,
When an arbitrary mold is selected from the plurality of molds and attached to the toggle type clamping device, the set housing position stored in association with the selected mold is acquired, and the tie bar is acquired. A mold mounting setup method for a toggle type injection molding machine, wherein a nut is driven to bring the mold clamping housing into the set housing position. The mold mounting setup method according to claim 1, wherein the setting housing position stored in association with the mold is determined by performing a mold clamping force adjustment in advance.
The mold clamping force adjustment is performed by moving the mold clamping housing by driving the tie bar nut in a state where the crosshead is at a predetermined set crosshead position, and stopping at a position where the mold touches,
The set crosshead position is a crosshead position where the set mold clamping force can be obtained when the mold is touched at this position and the crosshead is moved to the mold clamping completion position. Mold set-up method for a conventional injection molding machine. A fixed platen, a movable platen, a mold clamping housing, a tie bar connecting the fixed platen and the housing with the movable platen interposed therebetween, and the movable platen and the mold clamping housing. A toggle mechanism that opens and closes when the crosshead of the toggle mechanism is driven, and changes the position of the mold clamping housing when the tie bar nut provided on the tie bar is driven. A toggle type injection molding machine equipped with a device,
In the controller of the toggle type injection molding machine, for each of a plurality of molds, each mold and a set housing position with respect to the mold are stored in association with each other.
The set housing position is a position of the mold clamping housing at which a predetermined set mold clamping force required for the mold is obtained at a mold clamping completion position where the crosshead stops at the time of mold clamping,
When an arbitrary mold among the plurality of molds is selected and attached to the toggle type mold clamping device, the set housing position stored in association with the selected mold is acquired by the controller. A toggle type injection molding machine, wherein the tie bar nut is driven to move the mold clamping housing to the set housing position. The toggle type injection molding machine according to claim 3, wherein the setting housing position stored in association with the mold is determined by performing a mold clamping force adjustment in advance,
The mold clamping force adjustment is performed by moving the mold clamping housing by driving the tie bar nut in a state where the crosshead is at a predetermined set crosshead position, and stopping at a position where the mold touches,
The set crosshead position is a crosshead position where the set mold clamping force can be obtained when the mold is touched at this position and the crosshead is moved to the mold clamping completion position. Type injection molding machine.

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