JPH05116175A - Rotary molding system - Google Patents

Abstract

PURPOSE:To provide a low cost rotary molding system capable of transporting a die smoothly to improve the productivity of a resin molded product and thereby form a uniform-quality and high-accuracy resin molded product as a rotary molding system. CONSTITUTION:A molding die is guided under control to mold preheaters 13, 34 a precooler 22 ad either no of stations 1 to 4 using a central control panel. 15 and the first to the third movement stages 11, 20, 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary molding system, and more particularly to a rotary molding system having a temperature adjusting means for holding a plurality of molds having different temperatures at a constant temperature, each of which is provided with a moving means. The present invention relates to a rotary molding system for transferring a predetermined heating station, an injection molding station, a slow cooling station, and a molded product unloading station in this order to mold a molded product.

[0002]

2. Description of the Related Art In recent years, various types of injection molding that take advantage of molding by improving the precision of plastic molding, etc.
For example, a plastic lens such as an aspherical lens (optical element) is injection-molded. In the conventional molding apparatus of this type, the resin injected from the injection molding machine is cooled and cured on the spot to take out the resin from the mold, and then the next resin is injected again into the mold. However, this type of resin cannot be used by the injection molding machine to inject the next resin into the mold until the resin hardens, so not only is usage efficiency extremely poor, but the resin in the exit passage of the injection molding machine also hardens. The problem that it will happen has occurred.

As a means for preventing such a problem from occurring, for example, there is one described in JP-A-58-173635. This product prepares multiple dies, transfers the dies injected with resin by the injection molding machine to another place and slowly cools them at the same time. Since the mold is set and the resin is immediately molded in the mold, the use efficiency of the mold is improved and the resin in the outlet passage of the injection molding machine can be prevented from hardening. ..

In addition to this, for example, JP-A-61-89.
019 and JP-A-3-36005. In the former bulletin,
An injection molding machine and a plurality of cooling press machines are provided, and a mold filled with resin by the injection molding machine is moved to one of the plurality of cooling press machines, and the press machine pressurizes and cools while controlling the temperature. Adopt a system that does.

Further, in the latter publication, an injection molding machine and a plurality of press machines are provided, and the traverser is used to control the transfer speed and transfer waiting time of the mold so that the mold is By adopting a system that prevents the mold from staying in one place, the mold is smoothly transferred and the efficiency of use of the mold is improved.

[0006]

However, in each of the conventional molding systems described above, a plurality of molds are prepared and the molds are transferred, so that the molds do not stay. In order to operate the system smoothly, each mold had to be regularly transferred to the next step.

That is, when injection molding is performed using a plurality of molds, the process time, for example, the slow cooling process or the pressurizing process is lengthened due to variations in the temperature characteristics of each mold, resulting in sufficient molding accuracy. Could not be secured. For example, as described in Japanese Patent Laid-Open No. 3-36005, which controls the moving speed and the waiting time of the mold, since the moving speed is controlled, the smooth flow of the system should be maintained. However, there is a problem that the productivity of the resin molded product is deteriorated.

Further, in the one disclosed in Japanese Patent Laid-Open No. 61-89019, a plurality of cooling presses are provided to smoothly transfer the molds. However, when the number of molds is increased. Along with this, not only the number of cooling presses must be increased, but also the structure of the transfer means for transferring the mold to the cooling press becomes complicated, which increases the cost of the device. It has happened.

Therefore, the present invention provides a low-cost rotary molding system capable of smoothly transferring a mold to improve the productivity of a resin molded product and molding a uniform and highly accurate resin molded product. It is intended to be provided.

[0010]

The invention according to claim 1 is
In order to solve the above-mentioned problems, a pair of molds in which each unit forms a cavity is transferred to a predetermined heating station, injection molding station, slow cooling station, and molded product unloading station in order through moving means. In the rotary molding system for molding a molded article by means of a first temperature adjusting means provided between the heating station and the injection molding station for adjusting the temperature of the mold to a predetermined temperature, and between the heating station and the injection molding station. Is provided on the moving means, and is provided between the injection molding station and the slow cooling station, and the first moving stage for selectively transferring the mold to either the injection molding station or the first temperature adjusting means. Second temperature adjusting means for adjusting the temperature of the mold to a predetermined temperature, and an injection molding stay Second moving stage provided on the moving means between the cooling station and the slow cooling station, for selectively transferring the mold to either the slow cooling station or the second temperature adjusting means, the molded product take-out station and the heating stage. Third temperature adjusting means provided between the stations,
A third moving stage which is provided on a moving means between the molded product take-out station and the heating station, and which selectively transfers the mold to one of the heating station and the third temperature adjusting means, and a predetermined moving means. A temperature detecting means for detecting the temperature of the mold, and a control means for controlling the operation of the first, second and third moving stages based on the detection information of the temperature detecting means. There is.

In order to solve the above-mentioned problems, a second aspect of the present invention is to provide a pair of molds in which each unit forms a cavity therein, a predetermined heating station, an injection molding station, through a moving means, respectively. In a rotary molding system for transferring a slow cooling station and a molded product take-out station in this order to mold a molded product, a heating means is provided in the heating station for heating the mold to a glass transition point or higher, and a heating station and an injection molding station. One of an injection molding station and a preheating means, which is provided between the heating station and the injection molding station, and a preheating means that is provided between the heating station and the injection molding station. Moving stage for selective transfer to the heating station and moving stage. Temperature detecting means provided on the moving means for detecting the temperature of the mold, and an output signal of the detecting means is compared with a predetermined internal temperature, and the moving stage is moved based on the comparison result. And a control means for selectively controlling.

In order to solve the above-mentioned problems, a third aspect of the present invention is to provide a pair of molds in which each unit forms a cavity inside, a predetermined heating station, an injection molding station, through a moving means. In a rotary molding system for transferring a slow cooling station and a molded product unloading station in this order to mold a molded product, an injection filling means provided in an injection molding station for injecting and filling a mold with molten resin, a heating station, and A detection means provided on the moving means between the injection molding stations for detecting the temperature of the mold and an output signal of the detection means are compared with a predetermined internal temperature, and based on the comparison result, the injection filling means And a control means for controlling the operation.

In order to solve the above-mentioned problems, a fourth aspect of the present invention is to provide a pair of molds in which each unit forms a cavity therein, a predetermined heating station, an injection molding station, through a moving means. In a rotary molding system for transferring a slow cooling station and a molded product unloading station in this order to mold a molded product, an injection filling station provided in an injection molding station for injecting and filling a mold with molten resin, and an injection molding station. And a slow moving station between the injection molding station and the slow cooling station and a pre-cooling means for cooling the mold provided on the bypass moving means bypassed from the moving means between the heating station and the heating station. , Either the slow cooling station or pre-cooling means And a moving stage to selectively transfer,
And a control unit that determines whether or not the injection molding unit has performed injection molding on the mold and selectively controls the moving stage based on the determination result.

According to a fifth aspect of the present invention, in order to solve the above-mentioned problems, a pair of molds in which each unit forms a cavity therein is provided with a predetermined heating station, an injection molding station, through a moving means, respectively. In a rotary molding system for transferring a slow cooling station and a molded product take-out station in this order to mold a molded product, a cooling means provided in the slow cooling station for slowly cooling a mold and a cooling means provided in the cooling means are provided. A temperature detecting means for detecting a temperature, a cooling time detecting means provided in the cooling means for detecting a cooling time of the mold, and an output signal of the cooling time detecting means and the temperature detecting means are set to a predetermined set temperature and set inside. And a control means for controlling the cooling rate of the slow cooling means based on the comparison result compared with the cooling time.

In order to solve the above-mentioned problems, a sixth aspect of the present invention is to set a pair of metal molds in which each unit forms a cavity therein, through a moving means, to a predetermined heating station, injection molding station, In a rotary molding system that transfers a slow cooling station and a molded product unloading station in this order to mold a molded product, a temperature adjustment is provided between the molded product unloading station and a heating station to adjust the mold to a predetermined temperature. Means and a moving stage provided on the moving means between the molded product take-out station and the heating station, for selectively transferring the mold to either the heating station or the temperature adjusting means, and the molded product take-out station and the moving stage. Is installed on the moving means between the temperature to detect the temperature of the mold. Detection means, an output signal of the temperature detecting means as compared to the interior of the predetermined set temperature, is characterized by and a control means for selectively controlling the movement stage based on the comparison result.

[0016]

According to the first aspect of the present invention, when the mold is transferred to each station, the mold is provided to one of the first to third temperature adjusting means and each station by the control means and the first to third moving stages. Controlled to be guided. Therefore, when being transferred to each station, the mold having good temperature conditions is smoothly transferred to the next station, and the mold having bad temperature conditions is immediately transferred to the temperature adjusting means, and the temperature adjusting means is used. After being adjusted to a good temperature, it is transferred to the next station. Therefore, it is not necessary to control the transfer time between each station and the waiting time when transferring to the next station, and the temperature of the molds can be reliably controlled at each station without the retention of multiple molds. It As a result, the plurality of molds are smoothly transferred, the productivity of the resin molded product is improved, and a uniform and highly accurate resin molded product is molded. Further, a plurality of cooling press machines and the like as in the past are not required, and a rotary molding system can be obtained at low cost.

According to the second aspect of the present invention, the mold after being heated by the heating means is transferred to the injection molding station when the mold is within a predetermined temperature condition, and the mold outside the temperature condition is preheated. And is heated to a predetermined temperature condition by the heating means. Therefore, it is not necessary to control the transfer time between the heating station and the injection molding station or the waiting time when transferring to the injection molding station. Is surely controlled by. As a result, the plurality of molds are smoothly transferred, the productivity of the resin molded product is improved, and a uniform and highly accurate resin molded product is molded.

According to the third aspect of the invention, when the mold transferred to the injection forming station is out of the predetermined temperature condition, the injection molding is not performed on the mold. Therefore, wasteful injection molding is not performed on the mold outside the temperature condition, the mold is transferred as it is to the next step, and unnecessary mold does not stay at the injection forming station. As a result, the plurality of molds are smoothly transferred, the productivity of the resin molded product is improved, and a uniform and highly accurate resin molded product is molded.

According to the fourth aspect of the invention, when the injection molding operation is performed on the mold by the injection molding means, the mold is transferred to the slow cooling station, and the injection molding operation is not performed on the mold. At times, the mold is transferred to the pre-cooling means and cooled by the pre-cooling means to a temperature lower than the heat deformation temperature. Therefore, it is not necessary to control the transfer time between the injection molding station and the slow cooling station or the waiting time when transferred to the slow cooling station, and a plurality of molds do not stay. As a result, the plurality of molds are smoothly transferred, the productivity of the resin molded product is improved, and a uniform and highly accurate resin molded product is molded.

According to the fifth aspect of the invention, the plurality of molds are gradually cooled at a set speed corresponding to the temperature and time set by the cooling means. Therefore, a highly accurate molding operation without variations is performed, and a plurality of molds do not stay in the slow cooling station. As a result, the plurality of molds are smoothly transferred, the productivity of the resin molded product is improved, and a uniform and highly accurate resin molded product is molded.

In the sixth aspect of the invention, when the mold after the resin molded product is taken out at the molded product take-out station is within the predetermined temperature condition, the mold is transferred to the heating station and the metal mold outside the temperature condition is taken. The mold is transferred to the temperature adjusting means, and the temperature is adjusted by the temperature adjusting means so as to reach a predetermined temperature condition. Therefore, it is not necessary to control the transfer time between the molded product take-out station and the heating station and the waiting time when transferred to the heating station. Reliably controlled. As a result, a plurality of molds can be smoothly transferred to improve the productivity of resin molded products,
A uniform and highly accurate resin molded product is molded.

[0022]

EXAMPLES The present invention will be described below based on examples.
FIG. 1 is a diagram showing an embodiment of a rotary molding system according to the inventions described in claims 1 to 6. First, the configuration will be described. In the figure, the rotary molding system in this embodiment basically comprises a heating station 1, an injection molding station 2, a gradual example station 3, a molded product take-out station 4, a preheating station 5, a precooling station 6 and a preheating station 7. To be done. Although not shown, the dies transferred by the rotary molding system are a pair of dies in which each unit forms a cavity therein, as is well known, and the pair of dies are provided by a self-holding mechanism such as a screw. They are connected to each other so as to self-hold the forces in the mold clamping direction.

The heating station 1 is provided with mold heating devices 8a, 8b, 8c each having a heater block (not shown) as a plurality of heating means, and the plurality of molds have a temperature above the heat transition point (about 170 ° C.). The heating is performed rapidly so that the temperature becomes uniform. Further, between the heating station 1 and the injection molding station 2, there are provided mold transfer paths 9 and 10 as moving means using rollers, and on the transfer paths 9 and 10, direction change using rollers is performed. The first consisting of machines
A moving stage 11 is provided, and the first moving stage 11 is connected to a preheating station 5 which constitutes a first temperature adjusting means and a preheating means via a die transfer path 12 using rollers.

The preheating station 5 is equipped with a preheating device 13 having a heater block.
In No. 13, the mold is heated rapidly so as to reach a temperature above the thermal transition point (about 170 ° C). Further, the first moving stage 11 is rotated by 90 ° to selectively transfer the mold to one of the molded product take-out station 2 and the preliminary mold heating device 13 via the mold conveying paths 10 and 12, respectively. To do. Further, a right angle moving stage 14 is provided on the mold conveying path 10, and the moving stage 14 rotates 90 ° so that the mold transferred from the heating station 1 is transferred to the injection molding station 2. I have to.

The first moving stage 11 and the right-angled moving stage 14 are each provided with a temperature sensor and a micro switch (not shown) as temperature detecting means, and the preliminary heating device 13 is also provided with a temperature sensor and a micro switch. A switch is provided, and when the microswitch detects that the mold has been transferred to each of these stages 11, 14 and the heating device 13, the temperature sensor contacts the mold to detect the temperature of the mold, The detection information is output to the central control panel 15 as a control means.

The control board 15 has a first temperature setting region of 168 ° C. to 172 ° C. inside, and the temperature of the mold on the first moving stage 11 is detected by the temperature sensor. When a signal indicating that the temperature is in the range of ℃ to 172 ℃, that is, a signal that is substantially equal to the first set temperature, is input,
The mold inside is transferred to the injection molding station 2 via the mold conveying path 10, and when the output signal from the temperature sensor is outside the set temperature inside, the first moving stage 11 is moved to the preliminary mold heating device 13 side. To transfer the mold to the device 13. Further, the central control panel 15 makes the mold approximately 170 ° C. while detecting the mold temperature by bringing the temperature sensor into contact with the mold when the micro switch detects that the mold has been transferred to the preliminary mold heating device 13. Heat until.

The injection molding station 2 is provided with a known injection molding machine 16 as an injection filling means, and this injection molding machine 16 has a heat retaining machine 17 for keeping the temperature of the resin at a constant temperature. The molding machine 16 is adapted to inject the molten resin into the mold through a gate of the mold at a high pressure of about 1000 kgf / cm ² or more. In addition, the central control panel 15
It has a second temperature setting region of 168 ° C to 170 ° C, the temperature sensor of the right-angled moving stage 14 detects the temperature of the mold, and when the temperature is within the second setting region, it is injected into the injection molding machine 16. A signal indicating that molding is performed is output, and a signal indicating that injection molding is not performed is output when it is outside the second set area.

The injection molding station 2 and the gradual change station 3 are a mold conveying path 1 as a moving means using rollers.
8 and 19 are connected to each other, and a second moving stage 20 composed of a direction changer using rollers is provided between the conveying paths 18 and 19, and the second moving stage 20 is rotated by 90 °. By doing so, the mold is selectively transferred to either one of the pre-cooling station 6 and the slow cooling station 3 which are connected via the mold conveying path 21 using rollers. The pre-cooling station 6 is equipped with a pneumatic pre-cooling device 22 which constitutes the second temperature adjusting means and the pre-cooling means.

The slow cooling station 3 gradually cools the mold taken out of the injection molding machine 16 when it is opened to a temperature below the heat deformation temperature (solidification temperature) at a cooling rate of 5 ° C./minute or less. It has an air-type cooling device 23 as a cooling means for controlling the cooling device, and this cooling device 23 is provided with cooling fans 23a to 23d with a mold conveying path interposed therebetween. Further, the cooling device 23 has a temperature sensor as a temperature detection sensor and a timer (not shown), and the temperature sensor detects the temperature of the mold when the mold is transferred into the device 23 and detects the detected information. Central control panel
On the other hand, the timer is operated from the time when the mold is transferred into the apparatus 23 to output the operating time to the central control panel 15.

The central control board 15 controls the mold cooling speed based on the output signals from these temperature sensors and timers, and the mold temperature history and the cooling fan 23 are controlled.
By controlling the number of revolutions a to 23d, the die is adapted to an appropriate cooling curve. In this embodiment, the mold temperature is gradually cooled from 170 ° C. to 130 ° C. When four cooling fans 23a to 23d are provided, one stage requires a gradual time of about 120 seconds. ..

Further, the mold conveying path 21 conveys the mold for 40 seconds and cools it by air, and the air-type cooling device 22 cools the mold at 130 ° C. by a cooling fan (not shown) provided therein. It is designed to cool down. The second moving stage 20 transfers the mold to the slow cooling station 3 when the central control board 15 outputs a signal indicating that the mold has been subjected to the injection molding work, and at the same time, performs the injection molding work on the mold. Cooling device when a signal indicating that the
It is selectively rotated to transfer the mold to 22.

Further, the cooling device 22 is connected to a mold conveying path 25 as a moving means using rollers, which is connected to the heating station 1 via a mold conveying path 24 using rollers.
It is bypassed to the heating station 1 from the mold transfer paths 18 and 19. The mold transfer paths 21 and 24 form a bypass moving means.

On the other hand, the cooling device 23 is connected to the molded product take-out station 4 via a mold conveying path 26 as a moving means, and the molded product take-out station 4 is equipped with a mold opening / closing device 27, a take-out robot 28 and a pallet 29. It is equipped with. The mold opening / closing device 27 is designed to loosen the bolt of the mold to release the self-holding function of the bolt, or to tighten the bolt to give the self-holding function of the bolt, and the take-out robot 28 is self-holding. The resin molded product is taken out from the mold whose holding function has been released and transferred to the pallet 29.

The molded product take-out station 4 is connected to a right-angled moving stage 31 via a mold conveying path 30 as a moving means using rollers, and this moving stage 31 is composed of a direction changing machine using rollers. , 90 ° is rotated to selectively connect the mold transfer paths 24, 30 to the mold transfer path 25. The mold transfer path 25 is the third moving stage 32.
This moving stage 32 is composed of a direction changer using rollers, and by rotating 90 °, the mold is moved to the pre-heating station 7 and moving via the mold conveying path 33 using rollers. It is adapted to be selectively transferred to the mold transfer path 35 as means.

The preheating station 7 is equipped with a preheating device 34 as a temperature adjusting means having a heater block, so that the die can be quickly heated to a temperature of about 130 °. Further, the third moving stage 32 is provided with a temperature sensor and a micro switch (not shown) as temperature detecting means, and when the micro switch detects that the mold has been transferred to the moving stage 32, the temperature sensor is not The temperature of the mold is detected by contacting the mold, and the detected information is output to the central control board 15.

The control board 15 has a third temperature setting region of 128 ° C. to 132 ° C. inside, and the temperature of the mold on the third moving stage 32 is detected by a temperature sensor. When a signal indicating that the temperature is within the range of ℃ to 132 ℃, that is, a signal substantially equivalent to the third set temperature, is input,
Heating station for the internal mold via the mold transfer path 35
When the output signal from the temperature sensor is outside the set temperature inside, the third moving stage 32 is moved to the side of the preliminary mold heating device 34 and the mold is transferred to the device 34.
Further, the preliminary mold heating device 34 is also provided with a temperature sensor, and the temperature sensor also detects the temperature of the mold by contacting the mold, and outputs the detected information to the central control panel 15.

Next, the operation will be described. The mold having the self-holding function by the bolts by the mold opening / closing device 27 is cooled to about 130 ° C. by the cooling device 23. Therefore, the mold is heated to about 170 ° C. by the mold heating devices 8a, 8b, 8c. It heats so that it may become more than a transition point. After heating, the mold is transferred to the first moving stage 11 via the mold conveying path 9, and the temperature of the mold is detected on the stage 11. At this time, the central control panel 15 controls the temperature of the mold based on the output signal of the temperature sensor.
When it is determined that the temperature is within the first temperature range of 168 ° C. to 172 ° C., the mold is transferred to the right angle moving stage 14 via the mold transfer path 10.

On the other hand, when it is determined that the temperature is out of the range, the first moving stage 11 is moved to the side of the preheating device 13 and the mold is transferred to the device 13 through the mold conveying path 12. While contacting the temperature sensor with the mold, the mold is heated to a temperature of about 170 ° C. When the temperature sensor detects that the mold temperature has reached 170 ° C, the mold is heated by the preliminary mold heating device.
It is taken out from 13 and transferred to the right-angled moving stage 14.

When the mold is transferred to the right-angled moving stage 14, the temperature of the mold is detected on the stage 14 and the detected information is output from the temperature sensor to the central control board 15. Central control panel
15 is the mold temperature 168 based on the output signal of the temperature sensor
When it is determined that the temperature is within the second temperature range of ℃ to 170 ℃, the mold is transferred to the injection molding machine 16, injection molding is performed in the cavity, and then the mold is passed through the mold conveying path 18. Transfer to the second moving stage 20.

On the other hand, when the central control panel 15 determines that the temperature of the mold is out of the second temperature range, it outputs a signal to the injection molding machine to the effect that injection molding will not be performed, and the mold is injection molded. Machine
Transfer to 16 and transfer the mold without injection molding to the mold transfer path 18
And transferred to the second moving stage 20 via. Then the second
When the mold is transferred onto the moving stage 20, the central control board 15
Judges whether or not injection molding has been performed by the injection molding machine 16. When injection molding is performed, the mold is transferred to the cooling device 23 via the mold transfer path 19. Then, the timer is operated from the time when the transfer of the mold into the cooling device 23 is started, and the mold is once stopped in the device 23.
The temperature of the mold is detected by contacting the temperature sensor. The central control board 15 controls the speeds of the cooling fans 23a to 23d based on the output signals of these timers and temperature sensors, and at the optimum speed, the mold is heated up to a temperature below the heat deformation temperature of about 130 ° C (solidification temperature). Cooling.

On the other hand, when the central control board 15 determines that the injection molding has not been performed, the mold is transferred to the preliminary cooling device 22 via the mold conveying path 21. At this time, the transport path 21
After air cooling for 40 seconds in the mold at the
After being cooled to 130 ° C. at 22, it is transferred to the third moving stage 32 via the right-angle moving stage 31 and the die transfer path 25.

When the temperature sensor detects that the mold has been cooled to 130 ° C. by the cooling device 23, the mold is transferred to the molded product take-out station 4 via the mold conveying path 26. In the molded product take-out station 4, the mold opening / closing device 27 loosens the bolts of the mold to release the self-holding function by the bolts, and then the take-out robot 28 takes out the resin molded product from the mold and pallets the resin molded product 29. Transfer to. Next, after the bolts are tightened again by the mold opening / closing device 27 to give the mold a self-holding function, the mold is passed through the mold conveying path 30, the right angle moving stage 31, and the mold conveying path 25 to the third position. Transfer to the moving stage 32.

In the third moving stage 32, the temperature sensor is brought into contact with the mold to detect the temperature of the mold, and the detected information is output to the central control board 15. When the central control board 15 determines that the temperature of the mold is within the third temperature range of 128 ° C to 132 ° C based on the output signal of the temperature sensor, the mold is heated via the mold conveying path 35. Transfer to station 1. On the other hand, when it is determined that the mold is out of the range, the third moving stage 32 is moved to the side of the preheating device 34, and the mold is transferred to the device 34 through the mold conveying path 33, and the mold is set. While contacting the temperature sensor, the mold is heated to a temperature of about 130 ° C. When the temperature sensor detects that the mold temperature has reached 130 ℃,
The mold is taken out of the preliminary mold heating device 34 and transferred to the heating station 1.

As described above, in this embodiment, when the mold is transferred to each of the stations 1 to 4, the central control panel 15 and the first to first stations are used.
Since the molds are controlled to be guided to one of the preliminary mold heating devices 13 and 34, the preliminary cooling device 22 and each station by the three moving stages 11, 20, and 32, the molds with good temperature conditions can be selected. The mold can be smoothly transferred to the next stations 1 to 4, and the mold with bad temperature conditions is immediately transferred to the preliminary mold heating devices 13 and 34 and the preliminary cooling device 22 so that the molds 13 and 22 are good. After adjusting to a proper temperature, it can be transferred to the next station 1 to 4. For this reason,
It is not necessary to control the transfer time between each of the stations 1 to 4 and the waiting time when transferring to the next station 1 to 4, and the temperature of the molds can be maintained without retaining a plurality of molds. Can be reliably controlled at each of the stations 1 to 4. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy. Further, it is possible to eliminate the need for a plurality of cooling press machines and the like as in the conventional case, and it is possible to reduce the cost of the rotary molding system.

Further, when the mold heated by the mold heating devices 8a, 8b, 8c is within a predetermined temperature condition, the mold is transferred to the injection molding station 2 and the mold outside the temperature condition is transferred. Since the mold is transferred to the preliminary mold heating device 13 and heated by the device 13 so as to reach a predetermined temperature condition, it is transferred to the injection molding station 2 at a transfer time between the heating station 1 and the injection molding station 2. It is possible to eliminate the need to control the waiting time at the time of opening, prevent the molds from staying, and reliably control the temperature of the molds at the stations 1 and 2. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy.

Further, when the mold transferred to the injection forming station 2 is out of a predetermined temperature condition, injection molding is performed on the mold, so that there is no waste for the mold outside the temperature condition. The mold can be directly transferred to the next step without performing injection molding, and unnecessary molds can be prevented from staying in the injection molding station 2. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy.

The injection molding machine 16 transfers the mold to the slow cooling station 3 when the injection molding operation is performed on the mold, and when the injection molding operation is not performed on the mold, the mold is preliminarily spared. Transferred to the cooling device 22, the preliminary cooling device
Since it is cooled below the heat distortion temperature by 22, it becomes unnecessary to control the transfer time between the injection molding station 2 and the slow cooling station 3 and the waiting time when transferred to the slow cooling station 3. Therefore, it is possible to prevent a plurality of molds from staying. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy.

Further, since a plurality of molds are gradually cooled at a set speed corresponding to the temperature and time set by the cooling device 23, it is possible to perform a highly accurate molding work without variations, and at the same time, cool slowly. It is possible to prevent a plurality of molds from staying at the station 3. As a result, it is possible to smoothly transfer the plurality of molds to improve the productivity of the resin molded product, and it is possible to mold a uniform and highly accurate resin molded product.

Further, when the metal mold after taking out the resin molded product at the molded product take-out station 4 is within the predetermined temperature condition, it is transferred to the heating station 1, and the mold outside the temperature condition is preheated. Since the temperature is adjusted to a predetermined temperature condition by the heating device 34, the transfer time between the molded product take-out station 4 and the heating station 1 and the waiting time when transferred to the heating station 1 Can be eliminated, and the temperature of the molds can be reliably controlled by the heating station 1 without retaining a plurality of molds. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy.

In this embodiment, the mold heating devices 8a, 8
b, 8c, the preliminary die heating device 13, and the preliminary die heating device 34 are provided with heater blocks, and the die is heated by the heater blocks. However, the present invention is not limited to this, and a thermocouple is connected to the die to produce the die. May be heated.

[0051]

According to the first aspect of the present invention, when the die is transferred to each station, the die is controlled by the control means and the first to third moving stages so that the die is controlled by the first to third temperature adjusting means and each station. Since it is controlled so that it is guided to one of the stations, it is possible to smoothly transfer molds with good temperature conditions to the next station when transferring molds to each station, and molds with bad temperature conditions. The mold can be immediately transferred to the temperature adjusting means, adjusted to a good temperature by the temperature adjusting means, and then transferred to the next station. For this reason, it is not necessary to control the transfer time between each station and the waiting time when transferred to the next station, and the temperature of the molds can be controlled by each station without retaining a plurality of molds. Can be reliably controlled with. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy. Further, it is possible to eliminate the need for a plurality of cooling press machines and the like as in the conventional case, and it is possible to reduce the cost of the rotary molding system.

According to the second aspect of the present invention, the mold after being heated by the heating means is transferred to the injection molding station when the mold is within the predetermined temperature condition, and the mold outside the temperature condition is spared. It is transferred to the heating means and heated by the heating means so as to reach a predetermined temperature condition. Therefore, it is not necessary to control the transfer time between the heating station and the injection molding station or the waiting time when transferring to the injection molding station. Reliably controlled. As a result, the plurality of molds are smoothly transferred, the productivity of the resin molded product is improved, and a uniform and highly accurate resin molded product is molded.

According to the third aspect of the present invention, when the mold transferred to the injection forming station is out of the predetermined temperature condition, injection molding is not performed on the mold. The mold can be transferred to the next step as it is without performing wasteful injection molding for the mold located outside, and it is possible to prevent unnecessary mold from staying at the injection molding station. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy.

According to the invention described in claim 4, when the injection molding operation is performed on the mold by the injection molding means, the mold is transferred to the slow cooling station and the injection molding operation is not performed on the mold. Since the mold is transferred to the pre-cooling means and is cooled to the heat deformation temperature or lower by the pre-cooling means, the transfer time between the injection molding station and the slow cooling station and the time of transferring to the slow cooling station It is not necessary to control the waiting time, and it is possible to prevent a plurality of molds from staying. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy.

According to the fifth aspect of the present invention, since a plurality of molds are gradually cooled at a set speed corresponding to the temperature and time set by the cooling means, a highly accurate molding work without variations can be performed. This can be performed and it is possible to prevent a plurality of molds from staying in the slow cooling station. As a result, it is possible to smoothly transfer the plurality of molds to improve the productivity of the resin molded product, and it is possible to mold a uniform and highly accurate resin molded product.

According to the sixth aspect of the present invention, when the mold after the resin molded product is taken out at the molded product take-out station is within the predetermined temperature condition, the mold is transferred to the heating station and the temperature is outside the temperature condition. Since the mold is transferred to the temperature adjusting means and the temperature is adjusted by the temperature adjusting means so as to reach a predetermined temperature condition, it is possible to transfer the mold between the molded product take-out station and the heating station, or when transferring to the heating station. It is possible to eliminate the need to control the waiting time, and it is possible to reliably control the temperature of the molds in the heating station without causing a plurality of molds to stay. As a result, the plurality of molds can be smoothly transferred to improve the productivity of the resin molded product, and the resin molded product can be molded uniformly and with high accuracy.

[Brief description of drawings]

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

[Explanation of symbols]

1 heating station 2 injection molding station 3 slow cooling station 4 molded product take-out station 8a, 8b, 8c type heating device (heating means) 9, 10, 18, 19, 25, 26, 30, 35 mold conveying path (moving means) ) 11 first moving stage 13 preliminary heating device (first temperature adjusting means, preheating means) 15 central control panel (control means) 16 injection molding machine (injection filling means) 20 second moving stage 21, 24 mold transfer Line (bypass moving means) 22 Air precooling device (second temperature adjusting means, precooling means) 23 Air cooling device 32 Third moving stage 34 Preheating device (third temperature adjusting means)

Claims (6)

[Claims] 1. A pair of molds, each of which has a cavity formed therein, are transferred to a predetermined heating station, an injection molding station, a slow cooling station and a molded product unloading station in order through a moving means to mold the molded product. In the rotary molding system for molding products,
A first temperature adjusting means is provided between the heating station and the injection molding station to adjust the temperature of the mold to a predetermined temperature, and a moving means provided between the heating station and the injection molding station to inject the mold. A second moving stage provided between a first moving stage for selectively transferring to either the molding station or the first temperature adjusting means and an injection molding station and a slow cooling station for adjusting the temperature of the mold to a predetermined temperature. A second moving stage provided on the moving means between the injection molding station and the slow cooling station for selectively moving the mold to either the slow cooling station or the second temperature adjusting means; A third temperature adjusting means provided between the product take-out station and the heating station, and a molded product take-out station and a heating unit. A third moving stage provided on the moving means between the stations and selectively transferring the mold to either the heating station or the third temperature adjusting means; and a third moving stage provided on the predetermined moving means, A rotary molding system comprising: temperature detecting means for detecting a temperature; and control means for controlling the operation of the first, second and third moving stages based on the detection information of the temperature detecting means. 2. A pair of molds, each of which has a cavity formed therein, are transferred to a predetermined heating station, an injection molding station, a slow cooling station, and a molded product unloading station in this order through a moving means, and molded. In the rotary molding system for molding products,
A heating means provided in the heating station for heating the die to a glass transition point or higher; a preheating means provided between the heating station and the injection molding station to heat the die to a glass transition point or higher; A moving stage provided between the heating station and the moving stage, the moving stage being provided on the moving means between the injection molding stations and selectively transferring the mold to either the injection molding station or the preheating means. The
A temperature detecting means for detecting the temperature of the mold; and a control means for comparing the output signal of the detecting means with a predetermined internal temperature and selectively controlling the moving stage based on the comparison result. A rotary molding system characterized by that. 3. A pair of molds, each of which has a cavity formed therein, are transferred to a predetermined heating station, an injection molding station, a slow cooling station, and a molded product unloading station in this order through a moving means to perform molding. In the rotary molding system for molding products,
Injection filling means provided in the injection molding station for injecting and filling the mold with molten resin through the gate, and detection means provided on the moving means between the heating station and the injection molding station for detecting the temperature of the mold, A rotary forming system comprising: a control unit that compares an output signal of the detecting unit with a predetermined internal temperature and controls the operation of the injection filling unit based on the comparison result. 4. A pair of molds, each of which has a cavity formed therein, are transferred to a predetermined heating station, an injection molding station, a slow cooling station, and a molded product unloading station in this order through a moving means, and molded. In the rotary molding system for molding products,
It is provided on an injection molding station, which is provided with an injection filling means for injecting and filling a mold with a molten resin through a gate thereof, and a bypass moving means bypassed from a moving means between the injection molding station and the slow cooling station to a heating station. A moving stage provided on the moving means between the pre-cooling means for cooling the mold and the injection molding station and the slow cooling station, and selectively transferring the mold to either the slow cooling station or the preliminary cooling means. And a control unit that determines whether or not the injection molding unit has performed injection molding on the mold and selectively controls the moving stage based on the determination result. 5. A pair of molds, each of which has a cavity formed therein, are transferred to a predetermined heating station, an injection molding station, a slow cooling station, and a molded product unloading station in this order through a moving means, and molded. In the rotary molding system for molding products,
A cooling unit provided in the slow cooling station for gradually cooling the mold, a temperature detection unit provided in the cooling unit for detecting the temperature of the mold, and a cooling unit provided for the cooling unit to detect the cooling time of the mold. Cooling time detecting means and control means for comparing the output signals of the cooling time detecting means and the temperature detecting means with a predetermined internal temperature and preset cooling time, and controlling the cooling rate of the slow cooling means based on the comparison result. And a rotary forming system. 6. A pair of molds, each of which has a cavity formed therein, are transferred to a predetermined heating station, an injection molding station, a slow cooling station, and a molded product unloading station in order through a moving means to mold the molded product. In the rotary molding system for molding products,
The temperature adjusting means is provided between the molded product take-out station and the heating station and adjusts the mold to a predetermined temperature, and the moving means is provided between the molded product take-out station and the heating station. A moving stage for selectively transferring to either one of the heating station and the temperature adjusting means, and a temperature detecting means provided on the moving means between the molded product take-out station and the moving stage for detecting the temperature of the mold, Control means for comparing the output signal of the temperature detection means with a predetermined internal temperature and selectively controlling the moving stage based on the comparison result;
A rotary forming system characterized by having.