JP2007107791A - Material drying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and accurately perform material drying work. <P>SOLUTION: This device comprises a drying tank 3 storing and drying a resin material, and a time management device 5 managing whether the passage of drying time from drying start of the resin material is proper or improper. The time management device 5 performs report of whether the passage of drying time is proper or improper by a monitor 23, a lamp 25 and a buzzer 27, lights a red lamp part 33 and rings the buzzer 27 if drying elapsed time is shorter than a proper range, and lights a green lamp part 37 if the time is within the proper range, whereby accurate drying work can be facilitated while suppressing monitoring by a worker. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a material drying apparatus applied for drying a resin material of a resin component.

Resin molded products such as automobile parts are molded by pouring a resin material into a mold. At this time, if the resin material contains moisture, the resin material evaporates at the time of molding, causing a defect such as blistering or hydrolysis, and the molecular weight of the resin may be lowered to impair the original properties.
On the other hand, even if it is too dry, the properties of the resin molded product may be impaired. For this reason, pre-drying time management of the resin material is extremely important.

  Conventionally, as a material drying apparatus capable of pre-drying a resin material, there is an apparatus that supplies dry air to a material stored in a hopper to dry the material. In this material drying apparatus, the degree of drying of the material to be dried can be appropriately adjusted according to the type of material. Further, it is possible to keep the blower or the like operating even after the switch is turned off by the timer so that heat is not trapped in the heater box.

  However, it has not been possible to automatically manage whether or not the material is in an appropriate dry state, and an operator has to constantly monitor. For this reason, there is a problem that the material drying operation is complicated, and if monitoring is neglected, a poorly dried state or an excessively dried state is likely to be caused.

JP 2002-127137 A

  The problem to be solved is that the material drying operation by monitoring is complicated, and if the monitoring is neglected, it is easy to cause a poorly dried state or an excessively dried state.

  The present invention comprises a drying tank for storing and drying a material and a management device for managing whether the material is in an appropriate or inappropriate state in order to facilitate and accurately perform a material drying operation. This is the main feature.

  The material drying apparatus according to the present invention includes a drying tank that accommodates and dries the material and a management apparatus that manages whether the drying state of the material is appropriate or inappropriate. Therefore, the material is accommodated in the drying tank and dried. Whether the dry state of the material is appropriate or not can be managed by the management device.

  For this reason, monitoring by an operator can be suppressed and an accurate drying operation can be easily performed.

  The purpose of making the material drying operation easy and accurate was realized by managing whether the drying state of the material was appropriate or not.

[Resin material drying equipment]
FIG. 1 is a schematic block diagram of a resin material drying apparatus according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the resin material drying device 1 of this embodiment, which is a material drying device, includes a drying tank 3 and a time management device 5 as a management device. The resin material drying device 1 includes a drying controller and a drying air generating device in addition to the drying tank 3 and the time management device 5. The drying wind generating device is connected to the drying tank 3 side by a hose. The drying tank 3 is formed in two upper and lower layers and is provided with an opening / closing door. Therefore, it is possible to put different materials up and down. Temperature control for each upper and lower two layers is possible. If different materials have the same pre-drying temperature, they can be managed by putting them in either upper or lower layers.

  The drying tank 3 is for drying a resin material as a material, and includes a tray 7 as a material drying dish in which the resin material is accommodated and freely taken in and out. The tray 7 is made of a conductive material such as stainless steel. The drying tank 3 is provided with a pair of drying tray support portions 9 and 11. The drying tray support portions 9 and 11 are configured by providing electrode portions 17 and 19 formed of a conductive material, for example, brass along a pair of rails 13 and 15 formed of an insulator. One of the electrode portions 17 and 19 is an input side, and the other is a ground side.

  The time management device 5 detects that the tray 7 has been put into the drying tank 3 and manages the drying time. That is, the time management device 5 spans and supports the tray 7 over the drying dish support parts 9 and 11 and conducts between the drying dish support parts 9 and 11 so that, for example, a current of 5 V flows. I do. This time management device 5 manages whether or not the drying time has elapsed from the start of drying of the resin material, and includes a controller 21, a monitor 23, a lamp 25, and a buzzer 27.

  The controller 21 is composed of a CPU or the like, and the electrode units 17 and 19 are connected to the input unit 29, and the lamp 25 and the buzzer 27 are connected to the output unit 31. The controller 21 includes a timer that counts the elapsed drying time from the start of drying, and the counted time is output to the monitor 23. The monitor 23 will be described later.

  The lamp 25 and the buzzer 27 are connected to the output unit 31 of the controller 21. The lamp 25 notifies the appropriateness and inappropriateness of the passage of drying time by light, and the buzzer 27 notifies by sound. The lamp 25 has three stages of a red lamp part 33 and a green lamp part 37. If the drying time has passed, the green lamp unit 37 is turned on. If the drying time is not appropriate, the red lamp unit 33 is turned on and the buzzer 27 sounds. Further, when the drying time of the resin material is inappropriate, the red lamp section 33 and the buzzer 27 notify that the material is taken out by taking out the tray 7.

  The inside of the drying tank 3 is as shown in FIG. FIG. 2 is a perspective view showing the inside of the drying tank 3.

  As shown in FIG. 1 and FIG. 2, the drying tank 3 is provided with a plurality of stages of the drying dish support parts 9 and 11, and the tray 7 can be supported on each drying dish support part 9 and 11. The tray 7 is provided. In the present embodiment, the drying tray support portions 9 and 11 are provided in 16 stages, that is, the upper 8 stages in FIG. 2 and the lower 8 stages. The time management device 5 is configured to manage the drying time for each tray 7.

  As shown in FIG. 1, the monitor 23 constitutes a display device that displays the output of the timer, and a time setting signal is input to the controller 21 by the operation of the monitor 23. The count signal of the timer is input from the controller 21 to the monitor 23, and the monitor 23 displays the time as shown in FIG.

  FIG. 3 is an enlarged view showing a part of the monitor 23. As shown in FIG. 3, the monitor 23 displays NO1 to NO16 in accordance with the number of the drying pan supports 9, 11, and in FIG. 3, for example, the NO10 tray 7 is dried for 39 minutes 29 seconds. Is displayed.

  FIG. 4 is a front view of a monitor screen showing all stages, FIG. 5 is an enlarged view showing a one-stage display, and FIG. 6 is an explanatory diagram showing a time setting screen.

  The monitor 23 shown in FIG. 4 is a touch panel, and includes a green lamp unit 39 for displaying the operation, a red lamp unit 41 for alarm, and a time display unit 43 for each stage from NO1 to NO16. Yes. The time display unit 43 displays hours, minutes, and seconds. The time display in FIGS. 4 and 5 is the display before the time setting, and is all “12:12:12”.

  The monitor 23 can display the time setting screen of FIG. 6 by touching the upper left of the touch screen of FIG. On the time setting screen, “front 12” and “rear 12” are displayed up and down for each stage from NO1 to NO16. By touching “front 12”, the minimum drying time can be set. “After 12” makes it possible to set the maximum drying time by touching here. The time value is input using the numeric keypad 45, and includes an input time cancel button 47, a confirmation button 49, and the like.

[Time settings]
On the monitor 23, the upper left on the touch screen of FIG. 4 is touched to display the time setting screen of FIG.

  In FIG. 6, the display 23a of NO1 is enlarged and superimposed on the display for each stage from NO1 to NO16. The time setting for NO1 will be described.

  To set the minimum drying time, touch “Previous” and enter the numeric value with the numeric keypad 45. By this input, the numerical value part of “front 12” becomes the input numerical value. In this embodiment, the minimum drying time of the resin material is input as 3 hours (3H) for ABS, 4H for PBT, 5H for PPS, and the like.

  After inputting the time value, touch the confirm button 49 to confirm. When deflecting the input time, the cancel button 47 is touched to cancel the input time value, and the time value is input again by the above operation.

  Similarly, to set the maximum drying time, touch “After” and enter a numeric value with the numeric keypad 45. Others are the same as the minimum time setting.

  In this embodiment, ABS is used as the resin material in all stages and dried, and all stages minimum 3H and max 23H are set.

  Note that different resin materials can be set at each stage, and the time setting can be set for each material by selecting the stage.

[Drying operation]
A resin material is accommodated in the tray 7, and is inserted and set by sliding it to the back while being placed on the left and right drying dish insertion support portions 9 and 11, as shown in FIG. When the left and right electrode portions 17 and 19 are energized through the stainless steel tray 7 by this setting, the signal is input to the controller 21. In the controller 21, the timer starts operating and outputs a count signal to the monitor 23.

  On the monitor 23, the time display is displayed every second from “0: 0: 0”, for example “0:39:29” as in NO10.

  When the time management is operating, the green lamp portion 39 of the monitor 23 and the green lamp portion 37 of the lamp 25 are turned on.

  The drying operation is performed by driving the fan and heater of the drying tank 3 and generating drying air by heat exchange by the drying air generating device and guiding it to the drying tank 3. Accordingly, the drying air heated to an appropriate temperature is fed into the drying tank 3 and the resin material of each tray 7 is dried.

  In this drying operation, when the display time of the monitor 23 has not reached the set minimum 3H, the green lamp portion 39 blinks on the monitor 23, and the drying time of the resin material has not passed 3H since the start of drying. Let me know.

  If the tray 7 is taken out when the drying time is less than 3H, the resin material becomes poorly dried. Therefore, when the tray 7 is taken out in this state, the red lamp portion 41 of the monitor 23 and the red lamp portion 33 of the lamp 25 are turned on and the buzzer 27 sounds. At this time, if the preset time after taking out the tray 7 is within 5 seconds, for example, by returning the tray 7, the lighting of the red lamp section 33 and the ringing of the buzzer 27 are stopped and the time count continues. Is done.

  If the drying time is less than 3H and the tray 7 is taken out and exceeds 5 seconds, the time count is not continued even if the tray 7 is returned, the red lamp portion 33 is lit, and the buzzer 27 continues to sound. At this time, the red lamp portion 33 of the monitor 23 is pressed and reset to restart the drying operation such as time setting from the beginning.

  When the drying time exceeds 3H and falls below 23H, the green lamp portion 39 of the monitor 23 changes from blinking to lighting, indicating that the resin material has been properly dried.

  When the tray 7 is taken out between 3H and 23H, the left and right electrode portions 17 and 19 in that stage are turned off, the timer is reset, and the green lamp portion 39 is turned off. When the tray 7 remains in other stages, the green lamp portion 37 of the lamp 25 continues to be lit according to the above conditions.

  When the drying time exceeds 23H, the red lamp portion 41 of the monitor 23 and the red lamp portion 33 of the lamp 25 are turned on and the buzzer 27 sounds. This informs that the resin material is overdried.

  If the drying time exceeds 23H and is over-dried, it will not be reset simply by pulling out the tray 7, and it will be reset by further pressing the red lamp portion 33 of the monitor 23. Therefore, since it takes time to perform the resetting work, it is possible to prevent time deception by an easy resetting operation and prevent a quality defect.

  It is also possible to provide a configuration in which an allowance of 1 hour before and after is provided for the time setting of 3H to 23H, and control is performed in a time of 4H to 22H.

[Effect of Example 1]
The resin material drying apparatus 1 according to the first embodiment of the present invention includes a drying tank 3 that houses and dries the resin material, and a time management apparatus 5 that manages whether the drying time elapsed from the start of drying of the resin material is appropriate or inappropriate. Therefore, the material can be accommodated in the drying tank 3 and dried, and the time management device 5 can manage whether the dried state of the material is appropriate or inappropriate. For this reason, monitoring by an operator can be suppressed and an accurate drying operation can be easily performed.

  Since the time management device 5 includes a timer that counts the drying time elapsed from the start of drying and a monitor 23 that displays the output of the timer, the drying time can be easily confirmed by the monitor 23.

  The time management device 5 can notify the appropriateness or inappropriateness of the passage of the drying time by the red lamp section 33, the green lamp section 39 of the lamp 25, the green lamp section 39 of the monitor 23, the red lamp section 41, and the buzzer 27. It is possible to automatically and accurately notify whether the drying time has passed or not.

  The time management device 5 can notify the red lamp portion 33 of the lamp 25, the red lamp portion 4 of the monitor 23, and the buzzer 27 when the resin material is taken out when the drying time of the resin material is inappropriate. It is possible to automatically and accurately notify that the drying time has been inappropriate.

  The tray 7 is formed of stainless steel, and the drying tank 3 is provided with a pair of drying dish support portions 9 and 11 formed of brass or the like. The time management device 5 includes the tray 7 and the drying dish support portion. In order to detect that the tray 7 has been put into the drying tank 3 due to the connection between the drying tray support portions 9 and 11 which are supported by being spanned to 9 and 11, the tray 7 is managed. The drying time can be managed by putting in and out, and accurate and easy management can be performed.

  That is, after putting the tray 7 into the drying tank 3, the management of the drying time can be started or restarted without requiring any special switch operation. Therefore, it is not necessary to provide a special limit switch or the like for detecting the insertion / removal of the tray 7 in the drying tank 3, and the durability at high temperatures can be improved.

A plurality of trays 7 are provided, and the time management device 5 can manage the drying time for each tray 7, and can easily and accurately manage different materials or materials having different drying start times. Can do.
[Others]
In the above-described embodiment, the material drying apparatus is applied as the resin material drying apparatus. However, the material drying apparatus can be applied in the same manner as long as the material requires management of the drying time.

  It is also possible to provide a movable stopper so that the tray 7 cannot be taken out except for an appropriate time.

  In combination with the temperature change in the drying tank 3, it is possible to count the time when the temperature falls below a predetermined temperature within the appropriate range during the drying operation, and add the time to the drying time. That is, the time when the temperature is lower than the predetermined temperature is added as the time when the drying temperature is low and the drying operation is not properly performed. For example, when the minimum and maximum setting times are 3H and 23H, and the time when the temperature falls below the predetermined temperature is 1H in total, for example, the setting time is manually or automatically changed to 4H and 24H to suppress drying defects. In addition, the time margin until overdrying can be increased.

It is a schematic block diagram of the resin material drying apparatus (Example 1). It is a perspective view which shows the inside of a drying tank (Example 1). (Example 1) which is an enlarged view which shows a part of monitor. (Example 1) which is the front view of the monitor screen in which all the stages were shown (Example 1) which is an enlarged view which shows the display of 1 step | paragraph. (Example 1) which is explanatory drawing which shows a time setting screen.

Explanation of symbols

1 Resin material dryer (material dryer)
3 Drying tank 5 Time management device 7 Tray (material drying dish)
9,11 Drying pan insertion support 23 Monitor (display device)
25 lamp 27 buzzer

Claims (8)

A drying tank for containing and drying the material;
A material drying apparatus comprising: a management apparatus that manages whether the drying state of the material is appropriate or inappropriate. A drying tank for containing and drying the material;
A material drying apparatus comprising: a time management device that manages whether the drying time elapsed from the start of drying of the material is appropriate or inappropriate. The material drying apparatus according to claim 2,
The time management device includes a timer that counts the drying time elapsed from the start of drying, and a display device that displays an output of the timer. The material drying apparatus according to claim 2,
The said time management apparatus notifies the appropriateness of the said drying time progress, and at least one of a lamp | ramp or a buzzer. The material drying apparatus characterized by the above-mentioned. The material drying apparatus according to claim 4,
The said time management apparatus notifies at least one of a lamp | ramp or a buzzer when a material is taken out when the said drying time passage of the said material is improper. A material drying apparatus according to any one of claims 2 to 5,
The drying tank includes a material drying dish that accommodates the material and is freely removable.
The said time management apparatus detects that the said material drying pan was put into the said drying tank, and manages the drying time. The material drying apparatus characterized by the above-mentioned. The material drying apparatus according to claim 6,
A plurality of the material drying dishes are provided,
The said time management apparatus manages drying time for every said material drying pan. The material drying apparatus characterized by the above-mentioned. The material drying apparatus according to claim 6 or 7,
The material drying pan is formed of a conductor material,
The drying tank is provided with a pair of drying dish support portions formed of a conductive material,
The said time management apparatus spans and supports the said material drying pan on the said drying tray support part, and it originates in conducting between the drying dish support parts, The said material drying apparatus characterized by the above-mentioned.

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