JPH0839641A - Molding method and apparatus/using plurality of molds - Google Patents

Abstract

PURPOSE:To achieve the smooth flow of a system without generating stagnation in molds while obtaining a uniform and highly accurate molded product using a plurality of molds. CONSTITUTION:In a molding method using an injection molding machine 7 and a separately provided heating device 6 and preheating a plurality of molds (a)-(n) by the heating device 6 to successively transfer them to the injection molding machine 7 to perform injection molding, a temp. measuring means measuring the temp. of the molds (a)-(n) in the heating device 6 and/or on the way of the transfer of the molds (a)-(n) from the heating device 6 to the injection molding machine 7 along a transfer passage 1 and/or after transfer is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding technique, and in particular, molding is performed by sequentially transferring a plurality of molds to respective steps of a temperature raising step, an injection molding step, a cooling step and a molded product unloading step. The present invention relates to a molding method and a molding device useful for molding a product.

[0002]

2. Description of the Related Art In injection molding of plastics and the like,
In the process of cooling and curing the resin injected and molded from the injection molding machine on the spot, taking out the cured molding resin and performing the next resin injection, the injection molding machine takes the next resin until the resin is cured. Therefore, there are problems that the use efficiency is low and the resin in the outlet passage of the injection molding machine is hardened. Therefore, a plurality of molds are prepared, and the mold in which the resin is injected by the injection molding machine is moved to another place and cooled there, while the injection molding machine immediately transfers the resin to the next (another) mold. A molding system for injection has been proposed (for example, Japanese Patent Application Laid-Open No. 58-17 / 1983).
See Japanese Patent No. 3635).

Among such molding systems, the present applicant has provided an injection molding machine and a plurality of presses, and a mold filled with a resin injected and filled by the injection molding machine.
(Japanese Patent Application Laid-Open No. 61-8901).
No. 9). In addition, the applicant uses a guide and a traverser (hereinafter, referred to as a traverse device) that moves on the guide to transfer the mold from the injection molding process to one of a plurality of presses arranged along the guide along the guide. Also, there has been proposed a molding system (see, for example, FIG. 6 of Japanese Patent Application Laid-Open No. 61-89019) configured to be transferred from the press to the next step.

[0004]

However, in the case of the molding system configured to transfer the mold by using the traverse device as described above, the mold is moved from the injection molding process to a predetermined location along the guide of the traverse device. (Hereinafter, referred to as a base point), and from the base point to each press.

In order to operate the system smoothly without causing stagnation in the molds, it is necessary to regularly send each mold to the next step at regular intervals. However, in the system configured as described above, since the distance between the base point and each press machine is different, the time required for the mold to be transferred from the base point to each press machine is different depending on each press machine. Since the mold of each press machine is transferred to the next process at regular intervals as described above,
The pressurization and cooling time in each press machine is shortened.

Even when the die is transferred from each press to the next step, the time required for the die to be transferred from the press to the next step varies depending on each press, and the same as above. In addition, the process time in the next process is shortened. To cope with this, if the pressurizing / cooling time in each press machine and the process time in the next process are made constant, the mold is transferred to the next process later, so the mold is sent regularly at regular intervals. This is not possible, and retention occurs in the mold flow. To cope with this, it is necessary to control the temperature of each mold in order to guarantee the accuracy of the molded product. However, if control is performed for each mold in this way, the process will be performed depending on the temperature characteristics of each mold. There is a problem that the length of time is shortened, the smooth flow of the system is hindered, and the productivity is lowered.

Further, in the case of pressurizing / cooling using a plurality of molds as described above, even if the pressurizing / cooling time in each press machine is constant, the temperature characteristics of each mold are different, so that they are uniform. Since it cannot be cooled, the precision of the molded product varies. In order to cope with this and guarantee the accuracy of the molded product, it is necessary to perform temperature control for each mold, but if such control for each mold is performed, the temperature characteristics of each mold may cause a difference. There is a problem that the length of the process time is shortened, the smooth flow of the system is hindered, and the productivity is lowered.

The present invention has been made in view of the above circumstances, and achieves a smooth flow of the system when a molded product is molded using a plurality of molds without causing retention in the molds. Moreover, the object is to obtain a uniform and highly accurate molded product.

[0009]

According to the present invention, in order to achieve the above object, an injection molding machine and a temperature raising device provided separately from the injection molding machine are provided. In a molding method using a plurality of molds, the mold is transferred to the injection molding machine after the mold is heated, and injection molding is performed. In the temperature increasing device and / or the temperature increasing device, the injection is performed. Provided is a molding method using a plurality of molds, characterized by comprising temperature measuring means for measuring the temperature of the molds during and / or after the molds are transferred to a molding machine.

According to the present invention, in order to achieve the above object, a plurality of molds are prepared, each mold is heated in advance and then transferred to an injection molding machine, and each mold is different. In a molding method using a plurality of molds, which sometimes perform individual injection molding, during the temperature rising and / or during the transfer of the respective molds to the injection molding machine from the temperature rising and / or
Alternatively, there is provided a molding method using a plurality of molds, characterized in that the temperature of each mold is measured after the transfer.

In one aspect of the present invention, injection molding is performed when the temperature of the mold reaches a temperature suitable for the injection molding based on the temperature information of the mold obtained by the temperature measurement. In one aspect of the present invention, each mold in which a molding material has been injected by the injection molding machine is cooled, a molded product is taken out from the mold, and then the temperature of the mold is raised again. And perform injection molding on the mold.

According to the present invention, in order to achieve the above object, an injection molding machine, a temperature raising device, and a die transferring means are provided, and the temperature raising device preheats a plurality of dies, respectively. In a molding apparatus using a plurality of molds, wherein the molds are transferred to the injection molding machine by the mold transfer means, the temperature raising device and / or the injection molding machine, and And / or molding using a plurality of molds, characterized in that temperature measuring means for measuring the temperature of the mold is provided on a path from the temperature raising device of the mold transferring means to the injection molding machine. A device is provided.

According to the present invention, in order to achieve the above object, a molding method for molding a molded article by sequentially transferring a plurality of molds to a temperature raising step, an injection molding step, a cooling step and a molded article unloading step. , A plurality of molds, characterized in that the outer part of the mold is heated to a temperature higher than the inner part prior to the injection molding step, and then the inner part of the mold is raised to a temperature suitable for the injection molding. A molding method using a mold is provided.

In one aspect of the present invention, the mold is heated from the outside in the temperature raising step, and then the temperature of the inside part is raised by heat storage in the outside part of the mold. Also,
The following are technical ideas related to the present invention. In the method of forming a molded product by sequentially transferring a plurality of molds to a temperature raising process, an injection molding process, a cooling process, and a molded product unloading process, information about the mold condition, for example, a mold in a heated condition or a cooled condition. Means for controlling the speed of the transfer means for transferring the mold according to the information, or for making the mold stand by without transferring the mold, and comparing the information of this mold with predetermined information. To control the mold transfer by
A transfer means for transferring each mold between each step and a judging means for judging either a speed for transferring the mold or a transfer waiting time are provided, and the transferring of the mold is controlled by the judging means. A molding method having a plurality of molds.

A first time measuring means for measuring the temperature rise time of the mold in the temperature raising step in order to solve the staying of the mold due to the length of the temperature rise time of the die in the temperature raising step, The comparison operation of the first comparison means includes a control means for setting a predetermined temperature rising time depending on a molded product and a first comparison means for comparing the signal of the measuring means and the signal from the control means. A molding method having a plurality of molds, characterized in that the transfer of the molds is controlled by a waiting time or by a transfer speed.

In order to prevent the mold from staying due to the temperature rising time of the mold during the transfer of the mold from the heating process to the injection molding process, the mold is moved from the heating process to the injection molding process. A time measuring means for measuring the elapsed time during and after the transfer, a temperature measuring means for measuring the temperature of the mold during or after transferring the mold from the temperature raising step to the injection molding step, and The comparison means has a control means for setting a predetermined temperature rise time of the mold from the temperature raising step to the injection molding step, and a comparing means for comparing the signals from the time measuring means and the control means. A molding method having a plurality of molds, characterized in that the control by the waiting time of the mold or the control by the transfer speed of the mold is selected based on the comparison result of 1.

In order to prevent the molds from accumulating due to the difference in cooling speed of the molds housed in the plurality of coolers and cooled in the cooling process, a traverser for transferring the molds from the cooler to the take-out process, and a cooling device. A time measuring means for measuring the cooling time of the mold in the step, a control means for setting a predetermined cooling time of the mold in the cooling step, and a comparison for comparing the signal of the time measuring means with the signal of the control means. And a molding method having a plurality of molds, characterized in that waiting time control of the traverser or control by speed of the traverser is selected based on the comparison result of the comparison means. A first transfer means for sending the mold to a predetermined position in the cooling step, and a traverser for receiving the mold from the first transfer means and transferring the mold to the cooler in the cooling step. And means for driving the traverser,
A plurality of means for detecting whether or not a mold is present in the first transfer means and the traverser, and a control means for driving the drive means based on a signal from the detection means. A molding device having a mold.

The molds housed in the plurality of coolers in the cooling step may not be cooled at the set cooling speed depending on the reflux conditions. To solve this problem, a plurality of molds are installed in the injection molding machine. Inserted in and ejected, then taken out, the molds are sequentially transferred to a cooling process equipped with a plurality of coolers, and the molds cooled by each cooler are taken out from the coolers and transferred to a molded product take-out process A method for supplying a cooling medium to each cooling machine, a means for detecting a temperature of a mold set in each cooling machine, and a cooling time of the mold set in each cooling machine. Means, a means for storing a predetermined cooling time and cooling temperature of the mold, and a control means for switching the cooling temperature of the cooling medium, and the temperature of each mold of each cooling machine and each mold. The mold cooling time from the storage means Set cooling compared time and the cooling temperature, the molding method having a plurality of molds, characterized in that it has to switch the temperature of the cooling medium to each mold based on the comparison result.

In a configuration in which a plurality of molding machines are provided in the cooling step, and the molds are housed in each molding machine and cooled, the traverser is cooled in order to successively carry out the cooled molds from the molding machine. In order to cope with this, it is necessary to insert a plurality of molds into the injection molding machine, inject the resin, and then remove the molds, and to cool the molds with a plurality of coolers. A molding device for sequentially transferring to a molded product taking out step, and means for detecting the cooling temperature of each cooling machine,
A means for measuring a cooling time of a mold provided in each of the coolers, a means for storing a cooling curve indicating a temperature corresponding to a cooling time corresponding to a molded product to be injection-molded, and a mold from the plurality of coolers. Means for performing control for taking out, wherein the control means inputs information of the storage means, a signal of a cooling time and a cooling temperature of a mold in each of the cooling machines, and terminates cooling of the plurality of cooling machines. Means for extracting a mold to be extracted and outputting an extraction signal; and traversing means for transferring the mold between the cooling step and the molded article removing step, the means for controlling a traverser for transferring the mold. And a traverse means having a plurality of dies, wherein the control means receives the extraction signal from the take-out control means and moves the traverser to a position of a cooler in which the dies which have been cooled are stored.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a molding system according to an embodiment of the present invention. The overall configuration of the molding system 25 of the present embodiment includes four steps of A: temperature raising step, B: injection molding step, C: pressurizing and cooling step, and D: molded product unloading step. A mold transfer path 1 using rollers is connected to the step B, and a mold transfer path 5 and NC using rollers are connected between the injection molding step B and the pressure cooling step C.
The traverse device 2 is connected, and the pressure cooling process C and the molded product take-out process D are connected by the NC traverse device 2. Further, a traverse device control unit 22 is connected to the NC traverse device 2, and the traverse device control unit 22 is connected to the central control panel 17. The central control panel 17 is also connected to other devices of the main molding system (wiring is omitted).

Next, each device of the main molding system 25 will be described. Since the temperature raising step A requires a longer time than the injection molding step B, two temperature raising devices 6 are provided, and while one device is raising the temperature of the mold, the other is raised. The apparatus is also configured so that the temperature of other molds can be similarly raised. A direction changer 23 using a roller is provided in front of each of the temperature raising devices 6, and after the mold is carried in, the direction changer 23 is rotated 90 degrees to carry out the mold, thereby removing the molded product. The mold sent from 15 can be sent into the heating device 6, and the mold in the heating device 6 can be sent to the injection molding machine 7. The rollers of the direction changer 23 can be rotated by a built-in drive source. A transfer path 24 using a roller is connected between the molded product take-out device 15 and the direction changer 23, between the direction changer 23 and the temperature raising device 6, and between the direction changers 23. It is rotatable by a drive source built in.

In such a temperature raising device 6, after the mold is loaded into the furnace of the device, a temperature sensor (not shown) is connected to the mold and the mold is moved by a heater plate (not shown). Be heated. After being heated to a predetermined temperature, the temperature sensor is detached, and the mold is carried out of the furnace.

In the present embodiment, in the temperature raising step A, the mold cooled to 80 ° C. in the pressure cooling step C (described later) is set to 100 ° C. in 60 seconds. The temperature raising step A and the injection molding step B are connected to the mold transfer path 1 by a 90-degree reversing device 3a, and an elevator 26 is provided at a portion of the mold transfer path 1 which is bent at a right angle on the way. . The mold transfer path 1 is configured to be rotated by a drive source containing rollers arranged in the mold transfer direction, and the mold is placed on the rollers and moved in the transfer direction.

The mold transferred from the above-mentioned direction changer 23 to the elevator 26 through the mold transfer path 1 does not change the direction of the mold here, but changes only the moving direction by 90 degrees, and the mold has its direction. It is possible to proceed to the 90-degree reversing device 3a as it is. The 90-degree reversing device 3a is provided so as to reverse the mold by 90 degrees in order to cope with the injection molding machine 7 in which the injection section 7a is provided in the horizontal direction and to make the runner section of the mold in the horizontal direction. After passing through the 90-degree reversing device 3a, the mold is transferred to the mold standby position 4 in front of the injection molding machine 7, and at the mold standby position 4, the mold temperature is measured by a temperature sensor (not shown). . The mold, which has been heated to 100 ° C. in the heating step A, is further heated by heat conduction in the mold, and when the mold temperature reaches a predetermined molding temperature of 120 ° C., it is carried into the injection molding machine 7. And perform injection molding.

In the present embodiment, the set time from the end of the temperature raising step A to the raising of the molding temperature to 120 ° C. at the standby place 4 in front of the injection molding machine 7 is 120 seconds. In the injection molding process B, when the mold is carried into the injection molding machine 7, the die set of the molding machine 7 is clamped to 220 ° C.
After the resin was injected into the mold, the pressure was maintained for a certain period of time, the mold set was opened, and then the mold was unloaded.
It is sent to the 0 ° reversing device 3b. The injection molding machine 7 is provided with a temperature controller 8 for adjusting the temperature of the mold to a temperature required for injection filling.

In this embodiment, the time required for the mold to be carried into the injection molding machine 7 and then carried out from the injection molding machine 7 to reach the NC traverse device 2 (the point of a base point 13 described later) is 60. It is supposed to be in seconds. 9
The 0-degree reversing device 3b is used behind the injection molding machine 7, and the runner portion of the mold after injection is returned upward.

In the injection molding process B, the mold flows by the 90-degree reversing devices 3a and 3b with the runner portion lying down, and in the pressure cooling process C, the take-out process D, and the temperature raising process A, the mold is runner. It flows with the part up. In the case where the injection molding machine is configured so that the injection is performed in the downward direction, or when the die is in the pressure cooling step C, the ejection step D, and the temperature raising step A, the runner portion is in the lateral direction. If processed, the 90 ° reversing devices 3a, 3b are not required.
The mold transfer path 5 is used to transfer the mold that has passed through the 90-degree reversing device 3b to NC.
Like the mold transfer path 1, which is provided for transferring to the base point 13 of the traverse device 2 (the point where the NC traverse device 2 receives the mold), the rollers arranged in the transfer direction are rotated by a built-in drive source. Then, the die placed on the roller can be moved.

The NC traverse device 2 is 2 in this embodiment.
Book guide rail 9 and traverser 1 moving on it
It is composed of 0s. The traverser 10 includes a pair of left and right input conveyors 11 and an output conveyor 12. The loading conveyor 11 is operated by a built-in drive source, and the mold can be taken in from below in FIG. 1 and placed in the conveyor, and can be sent out upward. It is used when transferring to each press machine 18. The take-out conveyor 12 is operated by a built-in drive source, and it is possible to take in the dies from above in FIG. 1, place them in the conveyor, and send them out downward. It is used when transferring to the molded product removal device 15.

In this embodiment, the NC traverse device 2 is used to move the mold from the base point 13 to each press unit 1
8 is set to be 30 seconds, and the time required to reach the molded product removal device 15 from each press unit 18 is set to be 30 seconds.

The pressure cooling process includes eight press units 18
(No. I to No. VIII). The press units 18 (No. I to No. VIII) are arranged in parallel on the rail 9 of the NC traverse device 2. Further, each press unit has a rail 9 so that when the traverser 10 moves and comes in front of each press unit 18, a mold can be exchanged between the traverser 10 and the transfer path 14 of each press unit 18. It is provided at a predetermined distance. The transfer path 14 is operated by a built-in drive source and can transfer a mold placed on the transfer path 14. The press unit 18 has a pair of upper and lower re-press cooling die sets, and in each of the die sets, pipelines for flowing a refrigerant are pipelines 62a and 62b of the cooling medium supply means.
(Not shown). Then, the flow rate of the refrigerant flowing through the pipeline of each die set is adjusted by the fixed-side temperature controller 19 and the movable-side temperature controller 20 based on instructions from the central control panel 17 and the traverse device controller 22. . When the mold is inserted into a pair of upper and lower re-press cooling die sets, a temperature sensor is connected to the molds, and the upper and lower die sets move relative to each other to bring the molds into pressure contact with each other. The mold is cooled by the refrigerant flowing through the pipeline.
Cooling of the mold is performed with control such as changing the flow velocity or temperature of the refrigerant in the pipeline so as to obtain a predetermined temperature gradient.
As a result, the shrinkage strain and internal stress strain that occur when the molded product is cooled can be suppressed to a minimum.

In the main pressure cooling step C, the mold is cooled from 120 ° C. to 80 ° C. while being measured by the temperature sensor. When the mold is cooled to a predetermined temperature,
Remove the temperature sensor, open the die set relatively,
The mold is transferred to the take-out conveyor 12 of the traverser 10 through the transfer path 14.

In the present embodiment, the time required for the pressure cooling step C, that is, the time required for the mold to be carried into the transfer passage 14 of the press unit 18 and thereafter to finish cooling and to leave the transfer passage 14 is 480 seconds. Is set. In the present embodiment, the molded product unloading step D is installed at the lower right end of the NC traverse device 2 in FIG. 1, and the molded product unloading device 15 and the stocker 2 on the right side of the device 15 are located at that position.
1 is installed. When the traverser 10 moves and comes in front of the molded product unloading device 15, the unloading device is provided so that the mold can be transferred between the unloading conveyor 12 of the traverser 10 and the transfer path 16 of the molded product unloading device 15. 15 is rail 9
It is provided at a predetermined distance. When the mold is mounted on the molded product take-out device 15 through the transfer path 16 by the traverser 10, the opening stop mechanism provided in the mold is released,
The mold is opened, the molded product is ejected by the molded product projecting rod, and the molded product is stored in the stocker 21. The mold from which the molded product has been removed is clamped, locked, and transferred to the temperature raising step A (not shown).

In this embodiment, the time required for the take-out step D,
That is, the time required for the mold to be carried into the transfer path 16 of the take-out device 15 and for the mold from which the molded product has been taken out to move to the temperature raising step A is set to 60 seconds.
In the present embodiment, the take-out of the molded product that has been pressure-cooled by the press unit 18 and completed the molding is not performed on the press unit, but is concentrated by the molded-product take-out device 15 provided at another position as described above. When the take-out device is provided on the press unit 18, the structure of the press unit becomes complicated and large, and the take-out device must be provided for each press unit 18. I-No. VIII
However, the present invention solves the above problem by carrying out the take-out work at one place.

The traverse device control unit 22 commands the operation of the NC traverse device 2 according to a fixed program and the like, and the traverse device control unit 22 controls the NC traverse device 2 under the command of the central control panel 17. Then
The standby and speed adjustment of the traverser 10 can be performed.

The central control board 17 is connected to each device of the main molding system 25 via a control unit of each device (not shown) and controls the main molding system 25 as a whole. It should be noted that the system 25 is provided with a sensor at a predetermined position in order to detect whether or not the mold flowing through the system is at the predetermined position. That is, the base point of the transfer path 5, the feeding conveyor 11 and the unloading conveyor 12 of the traverser 10, and each press unit 18 (No. I).
~ No. Micro switches and the like are provided in the part of the mold VIII) where the mold is mounted, the part of the molded product take-out device 15 where the mold is mounted, etc. to detect whether or not the mold is in a predetermined position. It has been made possible.

Next, the arrangement and flow of dies in the molding system according to this embodiment will be described with reference to FIG. However, this is the case where the mold is controlled so as to be transferred at the set time in each step. FIG. 2 is a time chart of the mold, in which the time is shown on the horizontal axis as 1 minute = 1 time, and the position in the molding system according to the progress of the time of each mold is shown. In the present embodiment, one minute, which is the time required for the injection molding process and the transfer of the mold to the base point, is set as a basic time, and each mold is injected so that the resin is injected into the mold every minute in the injection molding process. Is flowed into the system with a one minute delay. In this embodiment, a total of 3 steps are required for the temperature raising step and the transfer of the mold to the injection molding machine.
1 minute for the injection molding process and transfer of the mold to the base point, 0.5 minute for transfer of the mold to the target press unit in the NC traverse device 2, 8 minutes for the pressure cooling process, NC traverse device The transfer of the mold to the unloading device 15 in No. 2 is 0.
It is set to take 5 minutes and 1 minute for the take-out process, so a total of 14 minutes is the time required for the mold to make one cycle, and therefore 14 ÷ 1 = 14 molds in the system. I need. 1 at time 14 in FIG.
The respective positions of the individual molds a to n are shown. As shown in FIG. 2, when the time advances from this state to time 15, the molds a to n respectively proceed, and for example, the mold a is located at the position of the mold n and the mold n is located at the position of the mold f. Position, mold f is mold e
Return to the position. When the time reaches the time 16 further,
For example, the mold a reaches the position of the press unit VII from the position of the mold n.

By the way, in an actual molding system, if the molds are transferred in accordance with the above-mentioned time chart, the mold temperature varies due to the difference in the temperature characteristics of the molds, and the mold condition is out of the range. , High precision molding cannot be expected. Also, if a method of cooling the mold temperature to the target value and increasing the temperature is adopted, high-precision molding can be performed.However, excess or deficiency occurs in each process time, and the smooth flow of the system is obstructed.
It significantly deteriorates mass productivity. Therefore, in the present embodiment, cooling and temperature increase in the process are not completed until the mold temperature reaches the target value in each process, and therefore, the set time in each process may be exceeded or insufficient. The time error is controlled by controlling the die transfer by the NC traverse device 2 by the waiting time or by the transfer speed so as to prevent the die transfer in the entire system from accumulating.

As described above, the condition judgment as to whether the die transfer is controlled by the waiting time or the transfer speed is performed in the following three cases. Firstly, in the temperature raising step A, whether or not the mold temperature rises from 80 ° C. to a target value of 100 ° C. for a set time of 60 seconds is insufficient. If the temperature increase time is longer than the set time adjustment by expediting (shown this time caused the delay time T _h), the transfer rate of the mold from the base point 13 to the press units 18 (indicated by V _BP) I do. Also,
When the temperature rising time is shorter than the set time, the mold transferred by the NC traverse device 2 is adjusted by providing a waiting time (indicated by T ₁ ) in front of each press unit 18.

Second, when the mold is transferred from the temperature raising step A to the injection molding step, that is, when the mold is carried out from the temperature raising step A and reaches the standby place 4 in front of the injection molding machine 7. The temperature rise time for the mold temperature to rise to the target value of 120 ° C in the set time 120
Whether excess or deficiency occurs in seconds. In this case as well, similarly to the above, from the base point 13 to each press unit 1
The excess and deficiency of the set time can be adjusted by controlling the transfer waiting time of the mold up to 8 and the transfer speed control (the delay time generated in this case is indicated by T _n , and the transfer waiting time is indicated by T ₁ ).

Thirdly, in the pressurizing and cooling step C, whether or not there is an excess or deficiency with respect to the set time of 480 seconds until the mold temperature reaches the target value of 80 ° C. from 120 ° C. If the set time is exceeded (the delay time generated at this time is indicated by T _p ), the molded product removal device 15
Until the transport speed of the mold (indicated by V _PT) adjusted by the control, and if you have insufficient set time, the transported mold product removal apparatus 15 waiting in front in the traverse device controller 22 ( T ₂ shown in) is adjusted by providing the.

Next, N of the molding system according to the present embodiment.
Operation of C traverse device
Each management flow while referring to the block diagrams of 3 to 5
This will be described with reference to FIGS. 6 to 12 showing another flowchart.
It When operating this system, the central control panel 17
Memorize the default value of the seed. In FIG. 3, each press unit
Knit 18 (No. I to No. VIII) and base point
Transfer time T between 13_BPSetting (B1), traverser 10
Transfer speed V setting (B2) for each press unit 18
Transfer time T from the take-out device 15_PTSetting (B3),
Distance L between the base unit and the base unit 13_xsettings of
(B4), distance L between each press unit and take-out device_yof
The setting (B5) is done and it is stored in the memory M of the central control panel 17.
The set values B1 to B5 are recorded. Also, in the memory M
Set time (t₁), From temperature rise
Set time between injection molding process (t ₂), In the pressure cooling process
Set time (t₃) Is stored.

First, in the mold transfer control flowchart of the temperature raising step A shown in FIG. 6, the emptied mold from which the molded product was taken out in the molded product taking out step D was carried into the temperature raising device 6 (Sal). After that, the temperature sensor is connected (Sa2) to start the temperature rise while measuring the mold temperature, and at the same time, start the temperature rise time measurement (Sa3, 4, 5). As for the mold temperature, a signal from the temperature sensor is read by the temperature measuring means 40.
The temperature rise time is measured by the first time measuring means T ₁ . Heated is conducted until the mold reaches the target value 100 ℃ (Sa6), this point has reached the target value to exit the heating off Atsushi Nobori time measuring timer (Sa7), time by time measuring means T ₁ Is output, and the temperature sensor is released from the mold (Sa8). At this time, in the central control panel 17, the measured temperature rising time (called the measured temperature rising time,
The same applies hereinafter) and the set heating time (the set heating time t ₁ ,
Hereinafter the same) compared with that made by the first comparison means 42 (Sa9), when the measured time T ₁ is shorter than the set time t _1, the waiting time control of the traverser 10 in the step shown in FIG. 9 is performed ( Hereinafter, it will be described later). If the measured temperature rise time is longer than or equal to the set temperature rise time, the delay time T _h calculated by subtracting the set temperature rise time from the measured temperature rise time is calculated by the first calculating means 43 (Sa10), and the central value is calculated. control panel 17 the delay time T _h is recorded in the (Sa11), thereafter, the speed control of the press unit 18 to the traverser 10 from the base point 13 in the step shown in FIG. 10 is performed (hereinafter, to be described later).

Next, in the flowchart of transfer management of the mold between the temperature raising step A and the injection molding step shown in FIG. 7, after the temperature raising of the die in the temperature raising step A is completed (Sb1), the injection from the temperature raising step A is performed. Second time measurement of die transfer process between molding processes
Start of the time measuring means T ₂ (Sb2), transferring the mold to an injection molding machine 7 before waiting area 4 (Sb3). Thereafter, at the standby place 4, a temperature sensor is connected to the mold (Sb4), and the temperature of the mold is measured by the second temperature measuring means 44. The mold that has gone out of the temperature raising step A is further heated by the heat conduction in the mold before reaching the standby place 4 in front of the injection molding machine 7. Then, by measuring the temperature of the mold, when the mold temperature reaches between the lower molding temperature limit and the upper molding temperature limit (Sb5), molding preparation from the central control panel 17 is performed based on the measurement signal of the second temperature measuring means 44. completion signal is issued (Sb6) and second time measuring means T ₂ is OFF
Is performed (Sb7). Then, the mold temperature sensor is removed from the mold (Sb8). At this time, the central control panel 17
, The measurement time (T ₂ ) of the second time measurement means T ₂
Is compared with the set time (t ₂ ) by the second comparing means 46 (Sb9). When the measurement time (T ₂ ) is shorter than the set time (t ₂ ), the waiting time control of the traverser 10 is performed in the process shown in FIG. 9 (to be described later). When the measured time is longer than or equal to the set time, the second calculation means 48 calculates the delay time T _i obtained by subtracting the set time from the measured time (Sb1).
0). The central control panel 17 the delay time recording T _i is made (Sb11), thereafter, the speed control of the traverser 10 to the pressing unit 18 is performed from the base point 13 at step shown in FIG. 10 (hereinafter, to be described later ).

Further, in the control flowchart in the pressurizing and cooling step shown in FIG. 8, a temperature sensor is connected to the die carried into the press unit 18 (Sc1) (S).
After c2), the third temperature measuring means 50 starts operating to start the pressurizing and cooling step (Sc3). Then, at the same time, the measurement of the time required for the cooling process is started by the third time measuring means 52 (Sc4). The cooling is performed while controlling with a predetermined temperature gradient (Sc5), and when the mold temperature reaches a temperature lower than the target temperature of 80 ° C. (Sc6), the cooling is terminated by the measurement signal of the third temperature measuring means 50. , Third
The time measuring means 52 is turned off (Sc7), and the temperature sensor is removed from the mold (Sc8). At this time, in the central control panel 17, a comparison between the measurement time of the third time measuring means 52 and the set time (t ₃ ) stored in the central control panel 17 is made by the third comparing means 54 (Sc9). ,
When the measurement time is shorter than the set time, the waiting time control of the traverser 10 is performed in the process shown in FIG.
See below). If the measurement time is longer than or equal to the set time, the third calculation means 56 calculates the delay time T _P in the cooling process in which the set time is subtracted from the measurement time (Sc10). This delay time T _P is recorded (Sc11), and thereafter, in the process shown in FIG.
Speed control of 0 is performed (described below).

In the process shown in FIG. 9, first, the traverser 10 is
After unloading the mold to the unloader 15, the base point 1
Returning to 3, the conveyor 11 stops in a state where the charging conveyor 11 coincides with the transfer path 5. Then, according to a command from the traverse device control unit 22 or the like, the sensor S
_{By 1} it is confirmed whether or not there is a mold in the take-out conveyor 12 (S01) and a confirmation signal S ₁ is output. Then, the sensor -S ₂ provided in the charging conveyor 11 checks whether the mold in the charging conveyor 11 there is (S02) and outputs a confirmation signal S _2, gold pre-feed conveyor advances further to S03 whether mold is present is confirmed by the sensor S ₃ on the mold transfer path 5, and outputs a confirmation signal S _3. When it is confirmed that the mold is present on the transfer path 5, the signals of the sensors S ₁ , S ₂ , and S ₃ shown in FIG. 4 are input to the discrimination logic circuit a1, and the conveyor is operated by the signal from the circuit a1. The input conveyor 11 is operated by the output of the means 60 (S04), and the mold is placed in the input conveyor 11.

Then, it is confirmed by the sensor S ₂ that there is a mold in the feeding conveyor (S05), and then the traverser 10 reaches the press unit No. Is selected by the press unit selection means 58 (S06). Each press machine (I to VIII) in the pressure cooling step C is provided with pipes 62a and 62b for circulating a cooling medium, and the cooling medium is supplied from the cooling medium supply means 62 via the passages 62a and 62b. .

The central control board 17 has a resin material and a shape of a molded product.
Setting (curve) information indicating the cooling temperature according to the shape and finishing accuracy.
Information has been entered in memory M. Mold for each press
Sensor D for measuring the cooling temperature of₁~ D₈And each mold
During cooling after inserting into each press and starting pressure cooling
Means P for measuring the distance₁~ P ₈Is provided. The above
Sensor D₁~ D₈Signal and measuring means P₁~ P₈Signal of
Is input to the central control panel 17, and is input to each memory.
In the central control panel 17, the temperature and cooling time information from each mold
Central control panel 1
The comparison means 64 in 7 makes a comparison, and this comparison means 64
Temperature adjusting means 6 for adjusting the temperature of the cooling medium based on the comparison signal of
Send to 6.

Then, in the temperature adjusting means 66, the comparing means 6
The temperature of the medium supplied to each press is adjusted by the signal of (4). The central control board 17 is provided with a discriminating means 68 for discriminating the die for which the pressure cooling is completed by inputting the cooling time and cooling temperature information of each die from each press.

The discriminating means 68, as shown in FIG. 5, receives the information (CP ₁ , CP ₂ ... CP ₈ ) from each press machine.
When the comparison signal n ₁ ~n ₈ when entered to the comparison means information CP ₀ as the criteria entered in the memory (n ₁ ~n _8), information from the press has reached a value indicating the cooling end Is output, and the presence or absence of the comparison signal is detected by the detection means 70 to determine which mold has completed the pressurizing and cooling operation. The central control panel 17 inputs a detection signal 70a of the detection means 70 to the traverse device control section 22.

The traverse device control section 22 receives the detection signal 70a and drives the driving means 72 of the traverser 10 at the base point 13 to operate the traverser 10. The end signals m _{1 to} m ₈ are output from the end signal generating means 74 to the pressing machine that houses the dies that have completed the pressurizing and cooling action, according to the outputs of the comparison signals n _{1 to} n ₈ .

The traverser 10 is driven by the driving means 72, and stops by accommodating the mold output by the end signal generating means. At this stop position, traverser 1
0 stands by (S07 / S08). This waiting time T
_1, in the first waiting time calculating means B9 of the central control panel _{17, T 1 = T BP -L} x / V made by calculation (Fig. 3, B9) (S09), the waiting time T ₁ is traversed It is input to the apparatus control unit 22, to wait a traverser 10 only waiting time T ₁ by a command of the traverse device controller 22 (S10).

After waiting for a predetermined time, the take-out conveyor 12
Is operated to move the mold from the press unit 18 to the take-out conveyor 12 (S12). Then, it is confirmed that there is a die in the take-out conveyor 12 (S13), and then the traverser 10 is moved so that the feeding conveyor 11 of the traverser 10 matches the transfer path 14 of the press unit 18 from which the die is taken out. It is moved slightly (S14, S15).

Then, the loading conveyor 11 is operated (S16) to send the mold into the press unit 18, and the presence of the mold in the press unit 18 is confirmed by a sensor (S17). Next, depending on whether or not the measurement time is equal to the set time in this cooling process, the central control panel 17 gives an instruction as to whether to reach the process shown in FIG. 11 or the process shown in FIG. 12 (S18). That is, when the delay time T _p due to the above calculation does not occur in the cooling process, the process shown in FIG. 11 is reached, and when the delay time T _p occurs, the process shown in FIG. 12 is reached.

In the process shown in FIG. 10, when the traverser 10 returns to the base point, whether there is a mold in the take-out conveyor 12 (S41), whether there is a mold in the feeding conveyor 11 (S42), the feeding conveyor 11 Is there a mold in front (S4
3) is determined, the process goes to S44, the loading conveyor 11 is operated, and the mold is placed in the loading conveyor (S45).

Then, as in the case of the waiting time control, the traverser 10 should reach the next press unit No. Is selected (S46). The press unit No. Simultaneously with the selection of, the speed of the traverser 10 is set and the traverser 10 is instructed (S47). The transfer speed V _BP of the traverser 10 is the first speed calculating means B of the central control panel 17.
11, V _BP = L _x / (T _BP −T _h −T _i ) (FIG. 3, B11) is performed, and this transfer speed V _BP is input to the traverse device control unit 22 to control the traverse device. The traverser 10 is transferred according to a command from the section 22.

The traverser 10 moves to the selected press unit at the commanded speed (S48), and the take-out conveyor 12 is stopped in a state where it coincides with the transfer path 14 of the press unit 18 (S49). 12 is operated to move the mold from the press unit 18 to the take-out conveyor 12 (S51), and then the traverser 10 is slightly moved so that the feeding conveyor 11 is aligned with the transfer path 14 (S52, S53). The mold of is moved to the press unit (S54, S55). Next, the central control panel 17 instructs whether to reach the step shown in FIG. 11 or the step shown in FIG. 12 depending on whether or not the measurement time is equal to the set time in the pressurizing / cooling step (S56). That is, when the delay time T _P due to the above calculation does not occur in the cooling process, the process shown in FIG. 11 is reached, and when the delay time T _P occurs, the process shown in FIG. 12 is reached.

In the process shown in FIG. 11, when it is confirmed that there is a mold in the press unit 18, the traverser 10 is moved to the molded product take-out device 15, and the take-out conveyor 1
2 is stopped in a state where it coincides with the transfer path 16 of the molded product removal device 15 (S19, 20).

Then, at that position, the traverser 10 is kept waiting for a predetermined time according to a command from the traverse device controller 22 (S22). This waiting time T ₂ is determined by the central control panel 17.
In the second waiting time computation unit B10 _{of, T 2 = T PT -L y} / V is performed by the calculation (FIG. 3, B10) (S21), the waiting time T ₂ is input to the traverse device controller 22 In response to a command from the traverse device control unit 22, the traverser 10 is made to wait for a waiting time T ₂ before the molded product take-out device 15 (S2).
3).

After waiting for a predetermined time, the take-out conveyor 12
Is operated to move the mold from the take-out conveyor 12 to the molded product take-out device 15 (S24). Then, the molded product take-out device 15
After confirming that there is a mold inside (S25), the traverser 10 is sent to the base point 13, and the traverser 10 is stopped in a state where the feeding conveyor 11 matches the transfer path 5 (S26, S27). Next, when the measured temperature rise time is equal to the set temperature rise time in the temperature rise process and the measured time is equal to the set time in the mold transfer process from the temperature rise process to the injection molding process, the process shown in FIG. 9 is reached. If not, the central control panel 17 gives an instruction as to whether the process shown in FIG. 10 is reached (S28).

In the process shown in FIG. 12, the transfer speed V _PT from the press unit 18 of the traverser 10 to the molded product take-out device 15 is set by the second speed calculating means B12 of the central control panel 17 as V _PT = _Ly / (T _PT -T _P ) (FIG. 3, B12) is calculated (S57), and this transfer speed V _PT is input to the traverse device control unit 22 and the traverse device control unit 22 issues a command. 10 is transferred from the press unit 18 to the molded product removing device 15 at a transfer speed V _PT . At the commanded speed, the traverser 10 moves to the take-out device 15 (S58), and the take-out conveyor 12 stops in a state where it coincides with the transfer path 16 of the take-out device 15 (S5).
9) After confirming that the unloading device 15 is not in operation, the unloading conveyor 12 is operated at the same time as stopping, and the mold is transferred from the unloading conveyor 12 to the unloading device 15 (S60, 61).

The traverser 10 in which both the feeding conveyor 11 and the unloading conveyor 12 are emptied returns to the base point 13 (S62), and the feeding conveyor 11 stops in a state where it coincides with the base point 13 (S63). Next, in the heating process, the measured heating time is equal to the set heating time, and
If the measurement time is equal to the set time in the mold transfer process from the temperature increasing process to the injection molding process, the process reaches the process shown in FIG. 9; otherwise, the central control panel 17 determines whether the process reaches the process shown in FIG. A command is issued (S64).

Although the traverse device is composed of the rail and the traverser in the above embodiments, the traverse device does not have the rail but moves the traverser on a flat road surface using a guide device or the like. Various other formats are possible. Further, the traverser device can be used not only for linear movement of the die but also for arranging the press units in various shapes such as an arc and moving the die along the shape.

Further, in the above embodiment, the temperature raising device is a heating system using a heater plate, but the temperature raising device may be of various types other than a constant temperature bath. The above embodiment has the following effects. In the method of forming a molded product by sequentially transferring a plurality of molds to a temperature raising process, an injection molding process, a cooling process, and a molded product unloading process, information about the mold condition, for example, a mold in a heated condition or a cooled condition. Means for controlling the speed of the transfer means for transferring the mold according to the information, or for making the mold stand by without transferring the mold, and comparing the information of this mold with predetermined information. In order to control the transfer of the mold by means of the above-mentioned embodiment, the transfer means for transferring each mold between the steps and the determination means for determining either the transfer speed of the mold or the transfer waiting time are used. And the transfer of the mold is controlled by the determining means.

Therefore, the mold temperature can be controlled reliably in each step, and the system can be operated smoothly without causing retention in a plurality of molds flowing through the system, and accuracy can be guaranteed by stabilizing molding conditions. , Productivity can be secured. In the molding system having a plurality of molds as in the above embodiment, each mold is heated to the set temperature in the temperature raising step to eliminate the temperature characteristic difference between the molds. In order to solve the stagnation of the mold in the molding system at this time, in the above-described embodiment, the first time measuring means for measuring the temperature rising time of the mold in the temperature raising step, and the temperature rising predetermined by the molded product. It has a control means for setting a time and a first comparison means for comparing the signal of the measuring means with the signal from the control means, and transfers the mold based on the comparison operation of the first comparison means. Since the control based on the waiting time or the control based on the transfer speed is selected, the difference in the temperature rising time between the molds is eliminated, and the molds do not stay in the molding system.

Therefore, by raising the temperature while measuring the temperature of each die as described above, it is possible to surely raise the temperature of the die to a set temperature, and a uniform and highly accurate molding can be performed by a plurality of dies. Therefore, the mold can be transferred according to the process time set in the molding system, and the molding system can be operated smoothly.

Further, in order to prevent the die from staying due to the temperature rise time of the die during the transfer of the die from the temperature raising step to the injection molding step, the above-described embodiment has the following steps. A temperature measuring means for measuring the temperature of the mold during or after the mold is transferred to the injection molding process, and a predetermined temperature rising time of the mold from the temperature rising process to the injection molding process are set. Control means and comparing means for comparing the signals from the time measuring means and the controlling means are provided, and control by the waiting time of the mold based on the comparison result of the comparing means, or by the transfer speed of the mold Since the control is selected, the mold heated to a uniform set temperature can be transferred to the injection molding process, and the mold does not stay in the molding system.

Therefore, each mold can be injection-molded under a uniform temperature condition, so that it is possible to mold a highly-accurate molded product without variations, and moreover, there is no stagnation in the transfer of the mold and the molding system. The smooth flow of can be realized. Further, in order to prevent the mold from accumulating due to the difference in cooling speed of the molds housed in the plurality of coolers and cooled in the cooling process, the above-described embodiment transfers the molds from the cooler to the unloading process. Traverser, time measuring means for measuring the cooling time of the mold in the cooling step, control means for setting a predetermined cooling time of the mold in the cooling step, signal of the time measuring means and signal of the control means Since there is a comparison means for comparing, the waiting time control of the traverser, or the control by the speed of the traverser is selected based on the comparison result of the comparison means. The excess or deficiency of the cooling time can be adjusted by the waiting time control or speed control of the traverser.

Therefore, in the cooling step, since the cooling can be performed on time as set, highly accurate molding without variations can be performed, and furthermore, in the molding system, each mold does not stay and the molding system does not stay. The smooth flow of can be maintained.

Further, in the above-mentioned embodiment, the first transfer means for sending the mold from the injection molding step to the predetermined position of the cooling step, and the cooling in the cooling step by receiving the mold from the first transfer means. A traverser for transferring a die to the machine, a means for driving the traverser, a means for detecting whether or not a die exists in the first transfer means and the traverser, and based on a signal from the detecting means Since it has a control means for driving the driving means, it is possible to surely load the metal mold without double-molding the metal mold on the traverser, so that the metal mold is dropped or damaged. Can be prevented, the transfer from the injection molding process to the cooling process can be reliably performed, and the reliability of the molding system is improved.

Further, in the cooling step, the molds housed in the plurality of coolers may not be cooled at the set cooling speed depending on the reflux conditions. However, in the above embodiment,
A means for supplying a cooling medium to each cooling machine, a means for detecting the temperature of the mold set in each cooling machine, a means for measuring the cooling time of the mold set in each cooling machine, and a predetermined And a control means for switching the cooling temperature of the cooling medium, the temperature of each mold of each cooling machine and the cooling time of each mold are described above. The cooling time and the cooling temperature set by the storage means are compared, and the temperature of the cooling medium to each mold is switched based on the comparison result. It is cooled to the set temperature.

Therefore, the difference in the cooling rate of each mold in the cooling step is eliminated, and the smooth flow of the molding system is secured. Furthermore, regarding the means for transferring a plurality of molds from the cooling step to the molded product unloading step, in the above embodiment, the means for detecting the cooling temperature of each cooling machine and the cooling time for the molds provided in each cooling machine are described. A means for measuring, a means for storing a cooling curve showing a temperature corresponding to a cooling time corresponding to a molded product to be injection-molded, and a means for performing control for taking out a mold from the plurality of coolers, The control means inputs the information of the storage means and the signals of the cooling time and the cooling temperature of the mold in each of the cooling machines, extracts the molds for which the cooling of the plurality of cooling machines is finished, and outputs the extraction signal. A traverse means for transferring the mold between the cooling step and the molded product take-out step, the traverse means having a means for controlling a traverser for transferring the die, and the control means for the take-out control. Extraction from means It is configured to have a plurality of molds for moving the traverser cooled finished mold receives a signal at the position of housing the chiller.

Therefore, since the cooling can be performed under the optimum condition according to the cooling curve corresponding to the cooling time corresponding to the molded product, it is possible to obtain a highly accurate molded product which does not easily cause defects in the molded product and has no variation. It is possible to perform mixed flow molding according to the molded product. Furthermore, after cooling is completed, the one that has been cooled the fastest according to the actual cooling state can be carried out of the molding machine and transferred to the molded product removal process, so that there is no time loss and overcooling is prevented. And a smooth flow of the molding system can be secured.

Therefore, the mold temperature can be controlled reliably in each step, and the system can be operated smoothly without causing stagnation in a plurality of molds flowing through the system, thus ensuring accuracy by stabilizing molding conditions. , Productivity can be secured.

[0074]

As described above, the present invention is effective for achieving a smooth flow of the system without causing stagnation in a plurality of dies, and for obtaining a uniform and highly accurate molded product. . Particularly, in the present invention, since the temperature measuring device for measuring the temperature of the mold is provided in the temperature raising device and / or during and / or after transferring the mold from the temperature raising device to the injection molding machine, Based on the temperature information of the mold obtained by measuring the temperature of each mold during or after transferring the mold to the injection molding machine from the time of warming or the temperature rising. The injection molding can be performed when the temperature of the mold reaches a temperature suitable for the injection molding, and the above-mentioned effectiveness is exhibited based on this.

Further, according to the present invention, the outer portion of the mold is heated to a temperature higher than that of the inner portion prior to the injection molding step, and then the inner portion of the mold is heated to a temperature suitable for the injection molding. The mold can be heated from the outside in the temperature raising step, and thereafter, the temperature of the inside portion can be raised by heat storage in the outside portion of the die during transfer to the injection molding step or the like. Smooth and efficient operation is realized, and the above-mentioned effectiveness is exhibited.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a molding system according to the present invention.

FIG. 2 is a time chart of a mold in the molding system shown in FIG.

FIG. 3 is a block diagram relating to control of a central control panel and a traverse device shown in FIG. 1.

4 is a block diagram relating to the conveyor operating means of FIG. 1. FIG.

FIG. 5 is a block diagram of a traverser driving unit.

FIG. 6 is a flowchart showing a transfer operation of a mold of the molding system shown in FIG. 1;

FIG. 7 is a flowchart showing a mold transfer operation of the molding system shown in FIG.

FIG. 8 is a flowchart showing a transfer operation of a mold of the molding system shown in FIG. 1;

FIG. 9 is a flowchart showing a mold transfer operation of the molding system shown in FIG. 1;

FIG. 10 is a flowchart showing a mold transfer operation of the molding system shown in FIG. 1.

11 is a flowchart showing a transfer operation of a mold of the molding system shown in FIG. 1.

FIG. 12 is a flowchart showing a mold transfer operation of the molding system shown in FIG.

[Explanation of symbols]

 A Temperature rising process B Injection molding process C Cooling process D Mold ejection process 2 NC traverse device 4 Waiting place before injection molding machine of mold 6 Temperature raising device 7 Injection molding machine 9 Guide rail 10 Traverser 11 Loading conveyor 12 Ejecting conveyor 13 Base point 15 Molded product take-out device 17 Central control panel 18 Press unit 22 Traverse device control part a to n Mold

Claims (7)

[Claims] 1. An injection molding machine, and a temperature raising device provided separately from the injection molding machine. After the temperature of the mold is raised by the temperature raising device in advance, the mold is transferred to the injection molding machine. In the molding method using a plurality of molds for performing injection molding, in the temperature raising device and / or during the transfer of the molds from the temperature raising device to the injection molding machine and / or after the transfer, A molding method using a plurality of molds, characterized by comprising temperature measuring means for measuring a temperature. 2. A plurality of molds prepared by preparing a plurality of molds, heating each mold in advance, and then transferring the molds to an injection molding machine, and performing injection molding individually for each mold at different times. In the molding method using, the temperature of each mold is measured at the time of the temperature increase and / or during the transfer of each mold to the injection molding machine after the temperature increase and / or after the transfer. And a molding method using a plurality of molds. 3. The injection molding is performed when the temperature of the mold reaches a temperature suitable for the injection molding based on the temperature information of the mold obtained by the temperature measurement.
A molding method using the plurality of molds according to claim 2. 4. A mold is injected with a molding material by the injection molding machine, each mold is cooled, a molded product is taken out from the mold, and then the mold is heated again and transferred to the injection molding machine. Then, a molding method using a plurality of molds according to claim 2 or 3, wherein injection molding is performed on the molds. 5. An injection molding machine, a temperature raising device, and a die transfer means, wherein the temperature raising device preheats a plurality of dies, respectively, and then the die transfer means moves the dies. A molding apparatus using a plurality of molds, which is configured to be transferred to the injection molding machine, wherein the temperature raising device and / or the injection molding machine and / or
Alternatively, a molding apparatus using a plurality of molds, characterized in that temperature measurement means for measuring the temperature of the mold is provided on a path from the temperature raising device of the mold transfer means to the injection molding machine. . 6. A temperature rising process for a plurality of molds, an injection molding process,
In a molding method in which a molded product is molded by sequentially transferring to a cooling process and a molded product removing process, an outer portion of the mold is heated to a temperature higher than an inner portion thereof before the injection molding process, and then an inner portion of the mold. A molding method using a plurality of molds, characterized in that the part is heated to a temperature suitable for the injection molding. 7. The plurality according to claim 6, wherein the mold is heated from the outside in the temperature raising step, and then the temperature of the inside part is raised by heat storage of the outside part of the mold. Molding method using the mold.