JPH0336005A - Molding method and device with multiple molds - Google Patents

Abstract

PURPOSE:To improve molding accuracy, while the mold-temperature in each process is controlled surely, and a plurality of molds are operated smoothly without the stop of said mold by a method in which the information relative to the mold in heating state or cooling state is inputted and is compared with a prescribed information, and the transfer of the mold is controlled, while its speed or writing time is judged. CONSTITUTION:An introduced mold is heated to a prescribed temperature in the temperature- raising device 6 of temperature-raising process A. Next, said mold is transferred to the stand-by position 4 of the mold in injection molding process B, and when the mold is heated to prescribed molding temperature, it is transferred into the injection molding machine 7 wherein a temperature-regulator 8 is provided, and then injection molding is carried out. The press unit 18 in pressurizing and cooling process C regulates the flow amount of cooling medium under the command of a central control board 17 and traverse-controlling part 22. When the mold is cooled to prescribed temperature, it is sent into molded object-taking out process D. Traverse device-controlling part 22 controls the operation etc. of NC traverse device 2 according to a determined program etc., under the command of the central control board 17 and achieves the stand-by and the speed regulation of a traverser 10. The central control board 17 is connected to each device through each controlling part etc., and controls them as a whole system.

Description

[Detailed description of the invention]

[Industrial application field] The present invention relates to a molding method and apparatus useful for molding a molded article by sequentially transferring a plurality of molds to each step of a temperature raising process, an injection molding process, a pressurized cooling process, and a molded product removal process. [Conventional technology]

In the injection molding of plastics, etc., the resin injected from the injection molding machine is cooled and hardened on the spot, the hardened resin is taken out, and the next resin is injected. Since it cannot be used for the next injection of resin until the molding process is completed, the usage efficiency is poor, and problems such as hardening of the resin in the exit passage of the injection molding machine occur. Therefore, multiple molds are prepared, and the mold into which resin is injected by the injection molding machine is moved to another location and cooled there, while the injection molding machine immediately injects the resin into the next mold. systems have been proposed (e.g., Japanese Unexamined Patent Publication No. 58
-173635). Among such molding systems, the present applicant provides an injection molding machine and a plurality of press machines, and moves a mold filled with resin by the injection molding machine to one of the plurality of press machines, where it is pressurized and He proposed a system for cooling while controlling the temperature (Japanese Patent Application Laid-Open No. 61-89019), and
The applicant uses a guide and a traverser that moves on the guide (hereinafter referred to as a traverse device) to transport a mold from an injection molding process to one of a plurality of press machines arranged in parallel along the guide, and A molding system configured to transport the press machine to the next process (for example, JP-A-61-89
No. 019, Figure 6) was proposed. [Problems to be Solved by the Invention] By the way, in the case of a molding system configured to transport a mold using a traverse device as described above, the mold is moved from a certain position along the guide of the traverse device from the injection molding process. (hereinafter referred to as a base point), and from that base point, it is transported to each press machine.In addition, in order to operate the system smoothly without causing stagnation in the mold, each It is necessary to regularly send the mold to the next process at regular intervals. However, in the system configured as above, the distance between the base point and each press machine is different, so
The time required for the mold to be transported from the base point to each press machine differs depending on each press machine, and on the other hand, the mold of each press machine is transported to the next process at regular intervals as described above, so each Pressure and cooling times in a press machine have different lengths. Also, when transporting molds from each press machine to the next process, the time required for the mold to be transported from each press machine to the next process differs depending on each press machine, and the There will be lengths and shortcuts in the process time in the process. To deal with this, if the pressurization/cooling time in each press machine and the process time in the next process are made constant, the mold will be transported to the next process with a delay. The molds cannot be fed regularly at regular intervals, resulting in stagnation in the flow of the mold.To deal with this, and to guarantee the precision of molded products, temperature control is performed for each mold. However, if each mold is controlled in this way, the process time will be lengthened or shortened depending on the temperature characteristics of each mold, which will hinder the smooth flow of the system and cause problems such as a decrease in productivity. arise. In addition, when pressurizing and cooling using multiple molds as described above, even if the pressurizing and cooling times in each press are constant, uniform cooling cannot be achieved because the temperature characteristics of each mold are different. In order to deal with this and guarantee the precision of molded products, it is necessary to control the temperature of each mold. If control is performed, the process time will be lengthened or shortened due to differences in the temperature characteristics of each mold, which will impede the smooth flow of the system and cause problems such as a decrease in productivity. The present invention was made in view of the above circumstances, and it is possible to achieve smooth flow of the system without causing stagnation in the molds when molding products using a plurality of molds, and to improve the molding process. The object of the present invention is to provide a molding method and apparatus that can produce uniform products with high precision. [Means for Solving the Problems] In a method of molding a molded product by sequentially transferring a plurality of molds to a temperature raising process, an injection molding process, a pressurized cooling process, and a molded product removal process, the state of the molds, e.g. Information regarding the mold in the heated state or cooling state is input, and the speed of the transport means for transporting the mold is controlled according to the information, or the mold is left on standby without being transported. In order to control the transfer of the mold by means of comparing and determining the information with predetermined information. A transfer means for transferring each mold between each process, and a discrimination means for discriminating either the speed at which the mold is transferred or the transfer waiting time, and the transfer of the mold is controlled by the discrimination means. A molding method having a plurality of molds, characterized in that: In order to solve the problem of mold stagnation caused by the length of the temperature rise time of the mold in the temperature rise process with respect to the set time, a first time measuring means for measuring the temperature rise time of the mold in the temperature rise process and a molded product are provided. comprising a control means for setting a predetermined heating time; and a first comparison means for comparing a signal from the measurement means and a signal from the control means, and based on a comparison operation of the first comparison means. A molding method having a plurality of molds, characterized in that the transfer of the molds is controlled by waiting time or by transfer speed. During the transfer of the mold from the temperature raising process to the injection molding process, the mold is transferred from the temperature raising process to the injection molding process in order to prevent the mold from stagnation due to the heating time of the mold. temperature measuring means for measuring the temperature of the mold during or after transfer; control means for setting a predetermined heating time of the mold from the temperature raising step to the injection molding step; the time measuring means; It is characterized by comprising a comparison means for comparing signals from the control means, and selecting control based on the waiting time of the mold or control based on the transfer speed of the mold based on the comparison result of the comparison means. Molding method with multiple molds. In order to prevent molds from stagnation due to differences in the cooling speed of molds that are stored in multiple molding machines and cooled during the heating process, we use a traverser that transfers the molds from the cooling machines to the removal process, and a pressurized cooling system. A time measuring means for measuring the cooling time of the mold in the process, a control means for setting a predetermined cooling time of the mold in the pressurized cooling process, and a signal of the time measuring means and a signal of the control stage. A molding method having a plurality of molds, characterized in that the molding method has a comparison means for comparison, and selects the waiting time control of the traverser or the control based on the speed of the traverser based on the comparison result of the comparison means, and a first transfer means for transporting the mold from the injection molding process to a predetermined position in the pressurized cooling process; and a mold that receives the mold from the first transfer means and transfers the mold to a cooling machine in the pressurized cooling process. With Traversa. means for driving the traverser; means for detecting whether a mold is present in the first transfer means and the traverser; and control means for driving the drive means based on a signal from the detection means. A molding device comprising a plurality of molds. Molds stored in multiple molding machines in the pressurized cooling process may not be cooled at the set rate due to reflux conditions, but to solve this problem, multiple molds are inserted into the injection molding machine. The mold is injected and then taken out, and the mold is sequentially transferred to a pressurized cooling process equipped with multiple cooling machines, and the mold cooled by each cooling machine is taken out from the cooling machine and transferred to the molded product removal process. The method includes means for supplying a cooling medium to each of the cooling machines, means for detecting the temperature of a mold set in each of the cooling machines, and measuring cooling time of the mold set in each of the cooling machines. 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. A plurality of molds, characterized in that the cooling time of the molds is compared with the cooling time and cooling temperature set from the storage means, and the temperature of the cooling medium to each mold is switched based on the comparison result. A molding method with In a configuration where multiple molding machines are installed in the pressure cooling process, and a mold is housed and cooled in each molding machine, the traverser is used to transport the molds that have been cooled down one after another from the molding machine. In order to deal with this, a molding device is sequentially transferred to the process and the molded product removal process, and a means for detecting the cooling temperature of each cooler;
a means for measuring the cooling time of the mold provided in each of the cooling machines; a means for storing a cooling curve indicating a temperature corresponding to the cooling time according to the molded product to be injection molded; The control means inputs information in the storage means and signals of the cooling time and cooling temperature of the mold in each of the cooling machines, and controls the cooling of the plurality of cooling machines to finish. means for extracting a mold to be processed and outputting an extraction signal; and traversing means for transporting the mold between the pressurized cooling step and the molded product removal step, the traverser for transporting the mold. a traversing means having a controlling means; and a plurality of molds, the control means moving the traverser to a position of a cooler storing molds that have been cooled in response to an extraction signal from the take-out control means. Device. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of the molding system of this embodiment. The overall configuration of the molding system 25 of this embodiment consists of four processes: A: temperature raising process, B: injection molding process, C: pressurized cooling process, and D: molded product removal process. Process B is connected to the mold transport path 1 using rollers, and injection molding process B and pressure cooling process C are connected to each other by a mold transport path 5 using rollers and an NC traverse device 2. , and the pressurized cooling process C and the molded product removal process are connected by an NC traverse device 2. Furthermore, traverse device 2
A traverse device control section 22 is connected to the traverse device control section 22, and the traverse device control section 22 is connected to the central control panel 17. Note that the central control panel 17 is also connected to other devices of this molding system (wiring is omitted). Next, each device of this rotary molding system 25 will be explained. This temperature raising process A requires a longer time than the injection molding process B, so while the two temperature raising devices 6 are in operation, the other device is also raising the temperature of other molds in the same way. It is configured so that it can be done. A direction changer 23 using rollers is provided in front of each temperature raising device 6,
After loading the mold, direction change tI! By rotating the mold 23 by 90 degrees and unloading the mold, the molded product ejecting device 15
The mold sent from the heating device 6 can be sent into the temperature raising device 6, and the mold inside the temperature raising device 6 can be sent to the injection molding machine 7. In addition,
The rollers of the direction changer 23 are rotatable by a built-in drive source. The molded product removal device 15 and the direction changer 23, the direction changer 23 and the temperature raising device 6, and the direction changers 23 are connected by a conveyance path 24 using rollers, and the rollers are also connected in the same manner. It can be rotated by a built-in drive source. In such a temperature raising device 6, after a mold is carried into the path of the device, a temperature sensor (not shown) is connected to the mold, and the mold is heated by a heater plate (not shown). . After heating to a predetermined temperature, the temperature sensor is removed,
The mold is carried out of the furnace. In this example, in the temperature raising step A, the pressurized cooling step C (
The mold is cooled to 80°C (described later) and is then heated to 100°C in 60 seconds. The temperature raising process and the injection molding process B are connected to the mold conveyance path 1 by a 90-degree reversing device 3a, and an elevator 26 is provided at the part where the mold conveyance path 1 bends at a right angle in the middle. . The mold transport path 1 is configured such that rollers arranged in the mold transport direction are rotated by a built-in drive source, and the mold is placed on the rollers and moved in the transport direction. The mold is transported from the direction changing machine 23 to the elevator 26 via the mold transport path 1. Here, only the moving direction is changed by 90 degrees without changing the orientation of the mold, and the mold remains in that orientation for 90 degrees. It is now possible to proceed to the degree reversing device 3a. The 90 degree inversion device 3a is provided to invert the mold by 90 degrees in order to make a part of the runner of the mold in the horizontal direction in response to the injection molding machine 7 in which the injection part 7a is provided in the horizontal direction. ,
After passing through this 90 degree reversing device 3a, the mold is transported to a mold standby position 4 in front of the injection molding machine 7, and at this mold standby position 4, the mold temperature is measured by a temperature sensor (not shown). . The temperature of the mold heated to 100°C in temperature raising step A is then further raised by heat conduction within the mold, and when the mold temperature reaches the predetermined molding temperature of 120°C, it is carried into the injection molding machine 7. Then, injection molding is performed. In this example, after the temperature raising step A is completed, the injection molding 11
The set time until the molding temperature is raised to 120° C. at the standby place 4 before 7 is 120 seconds. In the injection molding process B, when the mold is carried into the injection molding machine 7, the mold clamp of the molding fil7 is performed, and 2
After the resin at 20℃ is injected into the mold, the pressure is held for a certain period of time.
Next, after the mold of the goose set is opened, the mold is carried out and placed in the inverter 901 inverter 3a. The injection molding machine 7 is provided with a temperature regulator 8 for adjusting the temperature of the mold to a temperature required for injection filling. In this embodiment, after the mold is carried into the injection molding machine 7, it is carried out from the injection molding fil 7, and is then carried out by the NC traverse device 2.
The time required to reach the base point 13 (to be described later) is set to be 60 seconds. The 90-degree reversing device 3b is used at the rear of the injection molding machine 7, and a part of the runner of the mold after injection is returned upward. In the injection molding process B, the mold flows with a part of the runner lying down by the 90 degree reversing devices 3a and 3b, and the mold flows in the pressurized cooling process C.
1. In the extraction process D and the temperature raising process A, the mold flows with a part of the runner facing upward. In addition, if the injection molding machine is configured so that the injection is directed downward, or if the mold is in a state where a part of the runner is oriented horizontally in any of the pressurized cooling process C1, the ejecting process D, and the temperature raising process A. If processed,
90" reversing devices 3a and 3b are unnecessary. Mold conveyance path 5
is provided to transport the mold that has passed through the 90-degree reversing device 3b to the base point 13 of the NC traverse device 2 (the point where the traverse device 2 receives and takes the mold), and similarly to the mold transport path 1, The rollers arranged in the same direction are rotated by a built-in drive source, and the mold placed on the rollers can be moved. In this embodiment, the NC traverse device 2 includes two guide rails 9 and a traverser 10 that moves on them. The traverser 10 also has a pair of left and right input conveyors 11. It is composed of a take-out conveyor 12. The input conveyor 11 is operated by a built-in drive source, and is capable of taking in molds from the bottom in FIG. It is used when conveying from to each press machine 18. The take-out conveyor 12 is operated by a built-in drive source, and is capable of taking in the molds from above in FIG. 1, placing them in the conveyor, and sending them out downwards. It is used when transporting the molded product from the bag to the molded product removal bag al15. In this embodiment, the time required for the mold to reach each press unit 18 from the base point 13 using the traverse device 2 is 30 seconds, and the time required for the mold to reach the molded product removal device 5 from each press unit 18 is 30 seconds. It is set to be 30 seconds. The pressurized cooling process uses eight press units 18 (No.
I=No, ■). Each press unit 18 (No, I to No, ■) is the NC traverse device 2
The rails 9 are arranged in parallel. In addition, each press unit is mounted on a rail 9 so that when the traverser 10 moves and comes in front of each press unit 18, the mold can be exchanged between the traverser 10 and the conveyance path 14 of each press unit 18. It is installed at a predetermined distance. The conveyance path 14 is operated by a built-in drive source, and can convey the mold placed on the conveyance path 14. Press unit 18
has a pair of upper and lower re-press cooling gear sets, each of which has a pipe line for flowing a refrigerant connected to the pipe lines 62a and 62b of the cooling medium supply means (not shown). (omitted), and the flow rate of the refrigerant flowing through the pipes of each gusset is adjusted by the fixed-side temperature controller 19 and the movable-side temperature controller 20 under instructions from the central control panel 17 and the traverser control unit 22. Ru. When the mold is inserted into a pair of upper and lower re-press cooling die sets, a temperature sensor is connected to the mold, and the upper and lower die sets move relative to each other to pressurize the molds into contact, and the inside of the die set is The mold is cooled by the refrigerant flowing through the pipes. Cooling of the mold is performed with control such as changing the flow rate or temperature of the refrigerant in the pipes so as to obtain a predetermined temperature gradient. This makes it possible to minimize the shrinkage strain and internal stress strain that occur during cooling of the molded product. In this pressurized cooling step C, the mold is cooled from 120° C. to 80° C. while being measured by a temperature sensor. When the mold is cooled to a predetermined temperature, the temperature sensor is removed, the die set is opened relatively, and the mold is transported along the transport path 14 to the take-out conveyor 12 of the traverser 10. In this embodiment, the time required for the pressurized cooling process C, that is, the time required for the mold to be carried into the conveyance path 14 of the press unit 18, then finish cooling, and leave the conveyance path 14 is 480 minutes.
It is set to seconds. In this example, the molded product removal process is performed using the NC shown in FIG.
It is installed at the lower right end of the l-rubber device 2, at which position a molded product removal device 15 and a stocker 21 are installed on the right side of the device 15. When the traverser 10 moves and comes in front of the molded product take-out device 15, the traverser l
Conveyance path 1 of O take-out conveyor 12 and molded product take-out device 15
The take-out device 15 is provided at a predetermined distance from the rail 9 so that molds can be transferred to and from the rail 9. The mold passes through the conveyance path 16 by the traverser lO and is moved to the molded product ejecting device 1.
5, the opening prevention mechanism provided on the mold is released, the mold is opened, the molded product is ejected by the molded product ejection rod, and the molded product is placed in the stocker 21. stored. The mold from which the molded product has been taken out is clamped and locked to prevent opening, and then transported to temperature raising process A. In this example, the time required for the ejecting process, that is, the time required from when the mold is carried into the conveyance path 16 of the ejecting device 15 to when the mold from which the molded product has been taken out moves to the temperature raising process A is 60 seconds. It is set so that In this embodiment, the molded product that has been pressurized and cooled in the press unit 18 and has been molded is not taken out on the press unit, but the molded product take-out device 1 is provided at a different location as described above.
Concentrate on 5. Providing a take-out device on the press unit 18 would complicate the structure of the press unit and increase its size.
Since a take-out device must be provided at 8, the area occupied by the press unit groups No. 8, 1-No., and By performing the process at one location, the above problems are solved. The traverse device control unit 22 instructs the operation of the NC traverse device 2 according to a predetermined program, etc. The traverse device control unit 22 controls the traverse device 2 based on instructions from the central control panel 17, and controls the traverser 10. You can wait and adjust the speed. The central control panel 17 is connected to each device of the main molding system 25 via a control section of each device (not shown), and controls the main molding system 25 as a whole. Note that the five-piece 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 a predetermined position. That is, the base point of the conveyance path 5, the input conveyor 11 and the take-out conveyor 12 of the traverse 10, and each press unit 18 (No.
, I~No. ■) A microswitch, etc. is provided in the part where the mold is installed, the part where the mold is installed in the molded product ejecting device 15, etc., to detect whether the mold is in a predetermined position or not. Being able to do so. Next, the arrangement and flow of the molds in the molding system according to this embodiment will be explained with reference to FIG. 2. However, this is the case when the mold is controlled so that it is transported at the set time in each process. Figure 2 is a mold time chart, where the horizontal axis shows the time as 1 minute = 1 time, and the position in the molding system as the time of each mold progresses.6 In this example, injection molding The basic time is 1 minute, which is the time required for the process and transportation of the mold to the base point, and each mold is delayed by 1 minute so that resin is injected into the mold every 1 minute during the injection molding process. Designed to flow within the system. In this example, a total of three
1 minute for the injection molding process and transportation of the mold to the base point, 0.5 minutes for transportation of the mold to the target press unit in the NCl-rubber device 2, 8 minutes for the pressure cooling process,
0 when transporting the mold to the take-out device 15 in the traverse device 2
．． 5 minutes, and the ejection process takes 1 minute, so a total of 14 minutes is the time required for the mold to complete one cycle, so 14 ÷ 1 = 14 molds are placed in the system. I need. Figure 1 shows 1 at time 14.
The respective positions of four molds a-n are shown. As shown in FIG. 2, when time advances from this state to time 15, molds a''-'n advance, for example, mold a is at the position of mold n, and mold n is at the position of mold n. The mold returns to the position of the mold f, and the mold returns to the position of the mold e.When the time reaches time 16, for example, the mold a reaches the position of the press unit ■ from the position of the mold n. In a molding system, if the molds are transported according to the time chart above, the mold temperature will vary due to the different temperature characteristics of each mold, and the molding conditions will fall outside the range, making it impossible to achieve high precision molding. In addition, if you adopt a method that cools and raises the mold temperature to the target value,
Although high-precision molding is possible, the time required for each process is over or under, impeding the smooth flow of the system and significantly deteriorating mass productivity. Therefore, in this embodiment, cooling and temperature raising in each process are not completed until the mold temperature reaches the target value in that process, so that the set time in each process may be exceeded or insufficient. The time error caused by the mold transport by the traverse device 2 is controlled by the waiting time or by the transport speed to prevent stagnation in the transport of the molds throughout the system. As described above, the conditions for determining whether to control the conveyance of the mold by the waiting time or by the conveyance speed are made in the following three cases. First, in the temperature raising step A, the temperature raising time for raising the mold temperature from 80°C to the target value of 100°C is set at 60°C.
The question is whether there is an excess or deficiency in seconds. If the temperature rise time is longer than the set time (delay time that occurs at this time is indicated by T), adjustment is made by increasing the mold conveyance speed (indicated by Vap) from the base point 13 to each press unit 18. . Further, if the temperature increase time is shorter than the set time, the mold transported by the traverse device 2 is adjusted by providing a waiting time (indicated by T) in front of each press unit 18. Second, the mold is transported between the temperature raising process A and the injection molding process, that is, the mold is transported from the temperature raising process A to the waiting area 4 in front of the injection molding machine 7. Temperature is target value 12
The question is whether the temperature rising time to raise the temperature to 0° C. is longer or shorter than the set time of 120 seconds. In this case, as above, it is possible to adjust the excess or deficiency of the set time by controlling the waiting time for transporting the mold from the base point 13 to each press unit 18 and controlling the transport speed (the delay time that occurs in this case is T1). (The transfer waiting time is indicated by T1). Thirdly, in the pressurized cooling process C, the mold temperature is 120°C.
The question is whether there is an excess or deficiency in the set time of 480 seconds from 480 seconds to reach the target value of 80°C. If the set time is exceeded (the delay time that occurs at this time is indicated by Tp), the conveyance speed of the mold from each press unit 18 to the molded product take-out device 15 is adjusted by controlling the conveyance speed (v, indicated by 7), and the set time is If there is a shortage, the mold transported by the traverse device control unit 22 is placed in front of the molded product take-out device 15 for a waiting time (T).
). Next, regarding the operation of the traverse device of the rotary molding system according to this embodiment, the system diagram in Fig. 1 and the system diagram in Fig. 3A will be explained.
This will be explained using FIGS. 4(a) to 4(g) showing flowcharts for each management flow while referring to the block diagram of FIG. When operating this system, various initial setting values are stored in the central control panel 17. In FIG. 3(a), the setting of the transport time Tl1F between each press unit 18 (No, I to NO5■) and the base bond 13 (Bl), the setting of the moving speed V of the traverser 10 (B2), each press unit 1
8 to set the conveyance time between the take-out devices 15 (B3), set the distance between each press unit and the base point 13 (B4), and set the distance between each press unit and the take-out device (B5). , the set values B1 to B5 are recorded in the memory M of the central control panel 17. The memory M also stores a set time (tl) in the temperature raising step, a set time (1*) between the temperature raising and the injection molding step, and a set time (t,) in the pressure cooling step, which will be described later. First, in the mold transport management flowchart of the temperature raising step A shown in FIG.
Sal)L, then connect a 4 degree sensor (Si2) and start heating while measuring the mold temperature, and at the same time start measuring the heating time (Si2.4.5). The mold temperature is determined by reading a signal from a temperature sensor using a temperature measuring means 40. The temperature rising time is determined by a time measuring means TI. The temperature is increased until the mold reaches the target value of 100°C (Sad), and when the target value is reached, the temperature increase is ended and the temperature increase time measurement timer is turned off (Si7), and the time is set by the time measurement means Tl. signal is output. The temperature sensor is removed from the mold (Sn2). At this time, in the central control panel 17, the measured temperature increase time (referred to as measured temperature increase time; the same applies hereinafter) and the set temperature increase time (
A comparison with the set temperature rising time T1 (the same applies hereinafter) is performed by the first comparison means 42 (Si9), and if the measurement time Tl is shorter than the set time tl, the traverser 10 is Wait time control is performed (described below). Also, if the measured temperature rise time is longer than or equal to the set temperature rise time, the delay time Th, which is the set temperature rise time subtracted from the measured temperature rise time, is calculated as follows. 1 (SalO), this delay time Th is recorded in the central control board 17 (Sall), and then the press unit is moved from the base point 13 in the process shown in FIG. 4(e). 18
The speed of the traverser 10 is controlled until 0 (described later).Next, in the mold transport management flowchart between the temperature raising process and the injection molding process shown in FIG. After the temperature rise of the mold is completed (Sbl), the second time measuring means Tyo starts measuring the time of the mold transport process between the temperature raising process A and the injection molding process 5b2),
The mold is transported to the standby place 4 in front of the injection molding machine 7 (Sb3
), at this standby place 4, a temperature sensor is connected to the mold 5b4), and the temperature of the mold is measured by the second temperature measuring means 44. The temperature of the mold that has exited the temperature raising step A is further increased by heat conduction within the mold before reaching the waiting area 4 in front of the injection molding machine 7. Therefore, by measuring the temperature of the mold, when the mold temperature reaches between the molding lower limit temperature and the molding upper limit temperature (Sb5), the central control panel 17 prepares for molding based on the measurement signal from the second temperature measuring means 44. When the completion signal is issued (Sb6), the second time measuring means T1 is turned off (Sb7), and then the mold temperature sensor is removed from the mold (Sb
8). At this time, in the central control panel 17, the second comparing means 46 compares the measured time (T) of the second time measuring means T8 with the set time (t2) (Sb9). If the measured time (T,) is shorter than the set time (t2), the waiting time control of the traverser 10 is performed in the process shown in FIG. 4(d) (described later). Further, if the measurement time is longer than or equal to the set time, the second calculation means 48 calculates the delay time T, which is the set time subtracted from the measurement time.
(SblO). This delay time T1 is recorded on the central control panel 17 (Sbll), and after that, the speed of the traverser 10 is controlled from the base point 13 to the press unit 18 in the process shown in FIG. 4(e). (Described below). Furthermore, in the management flowchart in the pressurized cooling process shown in FIG.
A temperature sensor was connected to the mold that was made (Sc2).
), the third temperature measuring means 50 starts operating and the pressurized cooling process starts (Sc3). At the same time, measurement of the time required for the cooling process is started by the third time measuring means 52 (Sc4). Cooling is performed while controlling with a predetermined temperature gradient (Sc5), and the mold temperature reaches the target temperature of 80.
When the temperature reaches lower than ℃ (Sc6), cooling is terminated by a measurement signal from the third temperature measuring means 50, the third time measuring means 52 is turned off (Sc7), and the temperature sensor is removed from the mold. At this time, in the central control panel 17, the third comparing means 54 compares the measured time of the third time measuring means 52 and the set time (t3) stored in the central control panel 17. (Sc9), and if the measured time is shorter than the set time, the waiting time control of the traverser 10 is performed in the process shown in FIG. 4(f) (described later). Further, if the measured time is longer than or equal to the set time, the third calculation means 56 calculates the delay time T in the cooling process, which is the set time subtracted from the measured time (SCLO), and the central control panel 17 This delay time Tp
is recorded (Scll) and after L is completed, the speed of the traverser 10 is controlled from the press unit 18 to the take-out device 15 in the process shown in FIG. 4(g) (described later).
. In the process shown in FIG. 4(d), the traverser 10 first transports the mold to the take-out device 15, then returns to the base point 13, and stops when the input conveyor 11 is aligned with the conveyance path 5. Then, in response to a command from the traverser control unit 22 or the like, a sensor Sl provided in the take-out conveyor 12 checks whether or not there is a mold in the take-out conveyor 12.
l) Output a confirmation signal S1. Then, the input conveyor l
The input conveyor 11 is detected by the sensor S installed in the
Please check whether there is a mold inside. 2) A confirmation signal S is output, and the process further proceeds to SO3, where a sensor S confirms whether or not there is a mold on the mold conveyance path 5 in front of the input conveyor, and a confirmation signal s3 is output. After confirming that there is a mold on the conveyance path 5, the sensors S, , S2, and S2 shown in FIG. 3B are detected. A signal S is inputted to the discrimination logic circuit a1, and in response to the signal from the circuit al, the input conveyor 11 is operated by the conveyor operation output 60 (SO4), and the mold is placed in the input conveyor 11. Then, it is confirmed by the sensor S that there is a mold in the input conveyor (SO5), and then the press unit selection means 58 selects the press unit that the traverser 10 should reach.
(S. 6). Each press machine (■ to ■) in the pressurized cooling process C is provided with piping 62a, 62b through which a cooling medium flows, and a passage 62a is provided from the cooling medium supply means 62. A cooling medium is supplied via 62b. In the central control panel 17, setting (curve) information indicating the cooling temperature according to the resin material, shape, and finishing accuracy of the molded product is input into the memory M. Each press machine has a sensor D1 that measures the cooling temperature of the mold.
~D8, and means P and ~P6 for measuring the cooling time after each mold is inserted into each press machine and pressurized cooling is started are provided. The signals of the sensors D1 to D and the signals of the measuring means PI''-Pa are input to the central control board 17 and input to each memory.In the central control board 17, the temperature and cooling time of each mold are input. The comparison means 64 in the central control panel 17 compares the setting information set and input in advance, and sends the comparison signal from the comparison means 64 to the temperature adjustment means 66 that adjusts the temperature of the cooling medium. The means 64 adjusts the temperature of the medium supplied to each press according to the signal from the comparison means 64.The central control panel 17 inputs information on the cooling time and cooling temperature of each mold from each press and pressurizes the medium. It is equipped with a discriminating means 68 for discriminating which mold is to be cooled.The discriminating means 68, as shown in FIG. ) and the reference information CPo input into the memory are compared (
When the information from the press reaches a value indicating the end of cooling, a comparison signal nl''na is output, and the presence or absence of this comparison signal is detected by the detection means 70. It is determined whether the pressurized cooling action of the mold has been completed.The central control board 17 inputs the detection signal 70a of the detection means 70 to the traverse control section 22.The traverse control section 22 inputs the detection signal 70a of the detection means 70. In response, the driving means 72 of the traverser 10 located at the base point 13 is driven to operate the traverser 10. The press machine that accommodates the mold that has undergone the pressurized cooling action is operated in response to the output of the comparison signals n1-nl. end signal m1~m
, is output from the end signal generating means 74. The traverser IO is driven by the drive means 72 and stops when the mold to be output is received by the end signal generating means. The traverser 10 waits at this stop position (SO7, 5O8). This waiting time T is determined by the waiting calculation means B9 of the central control panel 17 as follows: TI = (T, PL, ) /V < Fig. 3A,
B9) is performed (SO9), and this standby time T1 is input to the traverse device control section 22, and the traverser 10 is made to stand by for the standby time T according to a command from the traverse device control section 22 (SIO). After waiting for a predetermined time, the take-out conveyor 12 is activated,
The mold is transferred from the press unit 18 to the take-out conveyor 12 (Si2). Then, it is confirmed that there is a mold in the take-out conveyor 12 (S13), and then the input conveyor 11 of the traverser 10
is the conveyance path 14 of the press unit 18 from which the mold has been taken out.
The traverser 10 is moved slightly so that it coincides with (S14, S15). Then, the input conveyor 11 is operated (S16) to send the mold into the press unit 18, and the sensor confirms that there is a mold in the press unit 18 (S1?)
Then, in this cooling process, depending on whether the measured time is equal to the set time or not, the process shown in FIG. 4(f) is reached.
A command is given from the central control panel 17 to determine whether the process shown in FIG. 4(g) is reached (S18). That is, if the delay time T, , calculated by the above calculation does not occur in the cooling process, the process shown in FIG. 4(f) is reached; if the delay time T, occurs, the process shown in FIG.
The process shown in g) is reached. In the process shown in FIG. 4(e), when the traverser 10 returns to the base point, it is determined whether there is a mold in the take-out conveyor 12 (S41) or whether there is a mold in the input conveyor 11 (S4).
2) It is determined whether there is a mold in front of the charging conveyor 11 (543), the process proceeds to S44, the charging conveyor 11 is operated, and the mold is placed in the charging conveyor (S45). Then, as in the embodiment of waiting time control, the traverser 10
is the press unit number that should be reached next. is selected (S46). Then, at the same time as selecting the press unit number, the speed of the traverser 10 is set and commanded to the traverser 10 (
S47), the conveyance speeds V and P of this traverser 10 are calculated in the speed calculation means B11 of the central control panel 17 as follows: V@p=L-/ (Tap-T7 T1) (Fig. 3A,
B1) This conveyance speed V ap is input to the traverse device control section 22 , and the traverser 10 is conveyed according to the command from the traverse device control section 22 . The traverser 1.0 moves to the selected press unit according to the commanded speed (548), and the take-out conveyor 12 stops in a state aligned with the conveyance path 14 of the press unit 18 (549), and at the same time as it stops, the take-out conveyor 12 operates. Then, the mold is taken out from the press unit 18 and transferred to the conveyor 12.
551), then move the traverser lO slightly to align the input conveyor 11 with the conveyance path 14 (S5
2.553) The molds in the input conveyor 11 are transferred to the press unit (S54, 555). Next, depending on whether the measured time in this pressurized cooling process is equal to the set time, the central control panel 17 determines whether the process shown in FIG. 4(e) or the process shown in FIG. 4(g) will be reached. command (S56),
That is, if the delay time T due to the above calculation does not occur in the cooling process, the process shown in FIG. 4(f) is reached, and if the delay time T occurs, the process shown in FIG. 4(g) is reached. . In the process shown in FIG. 4(f), press unit 1
When it is confirmed that there is a mold in the molded product take-out device 15, the traverser 10 is moved to the molded product take-out device 15 and stopped with the second take-out conveyor 12 aligned with the conveyance path 16 of the molded product take-out device 15 (S19.20). Then, the traverser 10 is kept waiting at that position for a predetermined period of time according to a command from the traverse device control unit 22 (S22
), this waiting time T, is the central system f! '[1! In the second waiting time control means BIO of 17, T s = < T st-t--) / v (third
It was performed by 7 calculations in Figures A and B10) (521),
This waiting time T2 is input to the traverse device control section 22, and the traverser 10 is made to wait for the waiting time T2 in front of the molded product take-out device 15 according to a command from the traverse device control section 22 (S23). After waiting for a predetermined time, the take-out conveyor 12 is activated,
The mold is transferred from the take-out conveyor 12 to the molded product take-out device 15 (S24). Then, after confirming that there is a mold in the molded product ejecting device 15 (S25), the traverser 10 is moved to the base point 13.
The traverser 10 is stopped with the input conveyor 11 aligned with the conveyance path 5 (S26, 527), and then the measured temperature increase time in the temperature increase process is equal to the set temperature increase time and injection starts from the temperature increase process. If the measured time is equal to the set time in the mold transport process leading to the molding process, the process shown in Fig. 4(d) is reached; otherwise, the process shown in Fig. 4(f) is reached.
) The central control panel 17 commands whether the process shown in ( ) is reached.
528). In the process shown in FIG. 4(g), the conveyance speed VPa from the press unit 18 of the traverser 10 to the molded product take-out device 15 is set in the central control panel 17. VP A"L-/ (TPT TP) (Fig. 3A
, B12) (S57), this transport speed V,a is input to the traverse device control section 22, and the traverser I
O is transported from the press unit 18 to the molded product take-out device 15 at a speed of V and A (S56). According to the commanded speed, the traverser lO moves to the extraction device 15.
558), the take-out conveyor 12 is moved to the take-out device 15.
559), confirm that the take-out device 15 is not in operation, and at the same time as stopping, the take-out conveyor 12 operates to take out the mold.
and then transferred to the take-out device 15 (S60.61). The traverser 10, which has become empty on both the input conveyor 11 and the take-out conveyor 12, returns to the base point 13 (S62),
The input conveyor 11 stops when it is aligned with the base point 13 (S63). Next, if the measured temperature increase time in the temperature increase process is equal to the set temperature increase time and the measured time is equal to the set time in the mold conveyance process from the temperature increase process to the injection molding process, then as shown in FIG. 4(d). If not, the central control panel 17 instructs whether the process shown in FIG. 4(f) is reached (S64). In the first embodiment, the traverse device is composed of a rail and a traverser, but there are various other types, such as one in which the traverser is moved on a flat road surface without rails using a guide device, etc. It is something that can be considered. Furthermore, the traverser device is used not only to move the mold linearly, but also when press units are arranged in various shapes such as circular arcs and the mold is moved along the shape. Further, in this embodiment, the temperature raising device uses a heating method using a heater plate, but various types of heating devices such as a constant temperature oven can be considered. [Effects of the Invention] According to the above description, the present invention has the following effects. In a method of molding a molded product by sequentially transferring a plurality of molds to a heating process, an injection molding process, a pressure cooling process, and a molded product removal process, the state of the molds, for example, the mold in a heating state or a cooling state. Input information about the mold, control the speed of the transport means for transporting the mold according to the information, or make the mold wait without transporting it, and compare this mold information with predetermined information to make a decision. To control the transfer of the mold by means of
The present invention is provided with a transfer means for transferring each mold between each process, and a determining means for determining either the speed at which the mold is transferred or the transfer waiting time, and the determining means is used to transfer the mold. It's like you want to control it. Therefore, the mold temperature can be reliably controlled in each process, and the system can operate smoothly without causing stagnation in the multiple molds flowing through the system, ensuring accuracy through stable molding conditions and increasing productivity. can be ensured. In a molding system having a plurality of molds as in the present invention, the temperature of each mold is raised to a set temperature in the temperature raising step to eliminate differences in temperature characteristics between the molds. In order to solve the stagnation of the mold in the molding system that occurs at this time, the present invention provides a first time measuring means for measuring the heating time of the mold in the heating process, and a heating time that is predetermined depending on the molded product. and a first comparing means for comparing a signal from the measuring means and a signal from the controlling means, and waits for transfer of the mold based on a comparison operation of the first comparing means. Since control based on time or control based on transfer speed is selected, the difference in heating time between molds is eliminated, and no molds remain in the molding system. Therefore, by raising the temperature while measuring the temperature of each mold as described above, it is possible to reliably raise the temperature of the mold to the set temperature, and even and highly accurate molding can be performed using multiple molds. The mold can be transferred according to the process time set in the system, and the molding system can operate smoothly. In addition, in order to prevent the mold from stagnation due to the heating time of the mold while the mold is being transferred from the temperature raising process to the injection molding process, the present invention a temperature measuring means for measuring the temperature of the mold during or after transferring the mold; a control means for setting a predetermined heating time of the mold from the temperature raising step to the injection molding step; It has a comparison means for comparing signals from the time measurement means and the control means, and based on the comparison result of the comparison means, selection is made between control based on the waiting time of the mold or control based on the transfer speed of the mold. As a result, the mold heated to a uniform set temperature can be transported to the injection molding process, and the mold does not remain in the molding system. Therefore, injection molding can be performed under uniform temperature conditions for each mold, making it possible to mold highly accurate molded products without variations.Moreover, there is no stagnation during mold transfer, and the molding system runs smoothly. Flow can be realized. Furthermore, in order to prevent molds from stagnation due to differences in cooling rates between molds that are housed and cooled in a plurality of molding machines in the heating process, the present invention transfers the molds from the cooling machines to the unloading process. a traverser, a time measuring means for measuring the cooling time of the mold in the pressurized cooling process, a control means for setting a predetermined cooling time of the mold in the pressurizing cooling process, a signal of the time measuring means and the It has a comparison means for comparing the signals of the control means, and based on the comparison result of the comparison means, selection of control based on the waiting time system of the traverser or the speed of the traverser is performed. The excess or deficiency of the cooling time relative to the set cooling time can be adjusted by the waiting time control or speed control of the traverser.Therefore, in the cooling process, cooling can be performed according to the set time, so there is no variation. High-precision molding can be performed, and each mold in the molding system can maintain a smooth flow without stagnation.Furthermore, the present invention enables the injection molding process to the pressurized cooling process. a first transfer means for transporting the mold to a predetermined position; a traverser for receiving the mold from the first transport means and transporting the mold to a cooling machine in the pressurized cooling process; and driving the traverser. means for detecting whether or not a mold is present in the first transfer means and the traverser; and control means for driving the drive means based on a signal from the detection means. Because of this, the molds can be loaded reliably without double stacking on the traverser, which prevents the molds from falling off or being damaged. This improves the reliability of the molding system.Furthermore, in the pressure cooling process, molds stored in multiple molding machines may not be cooled at the set rate depending on the reflux conditions. However, the present invention provides a means for supplying a cooling medium to each cooling machine, a means for detecting the temperature of a mold set in each cooling machine, and a means for detecting the cooling time of a mold set in each cooling machine. a means for measuring, a means for storing a predetermined cooling time and a cooling temperature of the mold, and a control means for switching the cooling temperature of the cooling medium to 4 degrees, and the temperature of each mold of each cooling machine The cooling time of each mold is compared with the cooling time and cooling temperature set from the storage means, and the temperature of the cooling medium to each mold is switched based on the comparison result. Each cooler cools to the set temperature at the set time. Therefore, the difference in the cooling rate of each mold in the cooling process is eliminated, and smooth flow of the molding system is ensured. Furthermore, the present invention relates to a means for transporting a plurality of molds from a cooling process to a molded product removal process, and the present invention provides means for detecting the cooling temperature of each cooler, and a means for detecting the cooling time of the molds provided in each cooler. means for measuring, a means for storing a cooling curve indicating a temperature corresponding to a cooling time according to a molded product to be injection molded, and a means for controlling removing the mold from the plurality of cooling machines, the control means The means inputs the information in the storage means and the cooling time and cooling temperature signals of the molds in each of the cooling machines, extracts the molds to be cooled in the plurality of cooling machines, and outputs an extraction signal. , a traverse means for transporting the mold between the pressurized cooling step and the molded product removal step, the traverse means having means for controlling a traverser for transporting the mold; The traverser is configured to have a plurality of molds that move the traverser to a position of a cooler storing molds that have been cooled in response to an extraction signal from an extraction control means. Therefore, cooling can be performed under optimal conditions using a cooling curve that corresponds to the cooling time depending on the molded product, which not only makes it possible to obtain high-precision molded products that are less likely to have defects but also to be able to produce different types of molded products. Mixed flow molding is possible according to the conditions. Furthermore, after cooling is completed, the item that has been cooled the fastest according to the actual cooling state can be taken out of the molding machine and transported to the molded product removal process, so there is no time loss and overcooling can be prevented. This ensures smooth flow of the molding system. Therefore, the mold temperature can be reliably controlled in each process, and the system can operate smoothly without causing stagnation in the multiple molds flowing through the system, ensuring accuracy through stable molding conditions and increasing productivity. can be ensured.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of a rotary molding system according to an embodiment of the present invention, Fig. 2 is a time chart of the mold in the rotary molding system shown in Fig. 1, and Fig. 3A is a center diagram of the rotary molding system shown in Fig. 1. FIG. 3B is a block diagram related to the control panel and control of the traverse device, FIG. 3B is a block diagram related to the conveyor operating means in FIG. 1, FIG. 3C is a block diagram related to the traverser drive means, and FIGS. 4(a) to (g) are 2 is a flowchart showing the mold conveyance operation of the rotary molding system shown in FIG. 1 for each stroke. A... Temperature raising process, B... Injection molding process, C... Pressure cooling process, D... Molding removal process, 2... Traverse device, 4... Gold in front of the injection molding machine Mold standby position, 6...
・Temperature raising device, 7... Injection molding machine, 9... Guide rail, 10... Traverser, 11... Input conveyor,
12... Take-out conveyor, 13... Base point,
15... Molded product removal device, 17... Central control panel, 1
8... Press unit, 22... Traverser control section, 25... Rotary molding system, a-n... Mold.

Claims (7)

[Claims] (1) In a molding method in which a molded product is formed by sequentially transferring a plurality of molds to a temperature raising process, an injection molding process, a pressurized cooling process, and a molded product removal process, each mold is transferred between each of the above steps. A plurality of metal molds, characterized in that the metal molds are provided with a transfer means and a determination means for determining either the speed at which the molds are transferred or the transfer waiting time, and the transfer of the molds is controlled by the determination means. A molding method using a mold. (2) A molding method in which a molded article is molded by sequentially transferring a plurality of molds to a temperature raising process, an injection molding process, and a pressurized cooling process, in which the heating time of the molds in the temperature raising process is measured. a first time measuring means; a control means for setting a predetermined heating time for the molded product; and a first comparison means for comparing a signal from the measuring means and a signal from the control means; A molding method having a plurality of molds, characterized in that the transfer of the molds is selected between control based on waiting time and control based on transfer speed based on the comparison operation of the first comparison means. (3) A molding method in which a molded product is formed by sequentially transferring a plurality of molds to a temperature raising process, an injection molding process, and a pressurized cooling process, the molds being transferred from the temperature raising process to the injection molding process. a temperature measuring means for measuring the temperature of the mold during or after the transfer; a control means for setting a predetermined heating time of the mold from the temperature raising step to the injection molding step; and the time measuring means. and a comparison means for comparing signals from the control means, and selecting control based on the waiting time of the mold or control based on the transfer speed of the mold based on the comparison result of the comparison means. A molding method featuring multiple molds. (4) A molding method in which a plurality of molds are sequentially transferred to a temperature raising process, an injection molding process, a pressure cooling process equipped with a plurality of coolers, and a molded product removal process, the molds being cooled by the cooling process. a traverser for transferring the mold from the machine to the unloading step; a time measuring means for measuring the cooling time of the mold in the pressurized cooling step; and a control means for setting a predetermined cooling time for the mold in the pressurized cooling step. , comprising comparison means for comparing the signal of the time measurement means and the signal of the control means, and selecting between waiting time control of the traverser or control based on the speed of the traverser based on the comparison result of the comparison means. A molding method featuring multiple molds. (5) A method of molding by transferring a plurality of molds to a heating process, an injection molding process, and a pressure cooling process equipped with a plurality of cooling machines, the method comprising transferring the molds from the injection molding process to a predetermined position in the pressure cooling process. a first transfer means for transporting the mold; a traverser that receives the mold from the first transfer means and transfers the mold to a cooling machine in the pressurized cooling process; a means for driving the traverser; a 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. Molding equipment with a mold. (6) Insert multiple molds into an injection molding machine, take them out after injection, and sequentially transfer the molds to a pressurized cooling process equipped with multiple cooling machines, and cool the molds by each cooling machine. A molding method in which the molded product is taken out from a cooling machine and transferred to a molded product taking-out step, comprising: means for supplying a cooling medium to each of the cooling machines; means for detecting the temperature of a mold set in each of the cooling machines; It has means for measuring the cooling time of the mold set in each cooling machine, means for storing the predetermined cooling time and cooling temperature of the mold, and control means for switching the cooling temperature of the cooling medium, The temperature of each mold and the cooling time of each mold of each cooling machine are compared with the cooling time and cooling temperature set from the storage means, and the temperature of the cooling medium to each mold is determined based on the comparison result. A molding method having a plurality of molds, characterized in that the molds are switchable. (7) A molding device that inserts a plurality of molds into an injection molding machine, injects resin and then takes them out, and sequentially transfers the molds to a pressure cooling process and a molded product removal process equipped with a plurality of coolers. means for detecting the cooling temperature of each of the cooling machines, means for measuring the cooling time of the mold provided in each of the cooling machines, and a cooling device that indicates a temperature corresponding to the cooling time depending on the molded product to be injection molded. means for storing a curve; and means for controlling removal of molds from the plurality of coolers, the control means storing information in the storage means;
inputting the cooling time and cooling temperature signals of the molds in each of the cooling machines, extracting the molds that have finished cooling in the plurality of cooling machines;
means for outputting an extraction signal; traverse means for transporting the mold between the pressurized cooling step and the molded product removal step, the traverse means having means for controlling a traverser for transporting the mold; . A molding apparatus having a plurality of molds, wherein the control means receives an extraction signal from the take-out control means and moves the traverser to a position of a cooler storing molds that have been cooled.