JP2000346787A - Weatherability tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the tester performing a test under a plurality of temp. conditions in the same test tank at the same time with respect to the test temp. of a sample. SOLUTION: At first, wind direction adjusting plate groups 16, 17, 18 of either one of stages are regulated to regulate the wind quantity to the rear surface of the sample holder 6 of this stage part to predetermined quantity and a heater 14 or cooler 15 is operated so that the indication temp. of the black panel temp. regulation sensor 7 attached to the stage of the sample holder 6 becomes the set temps. of stage temp. setting devices 10, 11, 12 and, in this state, the respective wind direction adjusting plate groups are integrally operated so that the temps. of the respective black panel temp. regulation sensors 7 attached to the other stage of the sample holder 6 becomes the indication temps. of the respective temp. setting devices to enable a test at different test temps. in each stage of the sample holder 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test temperature of a sample in a weather tester, and more particularly, to a technique for simultaneously testing a sample under a plurality of temperature conditions in the same test tank.

[0002]

2. Description of the Related Art Generally, a weather tester is constructed so that the test temperature of all samples becomes the same. FIG. 3 is a structural view of an example of such a weather tester, in which a light source (3 ') for a weather test is suspended at the center of a test tank (2'), and a rotating frame (4 ') rotating around the light source (3'). A sample holder (6 '), which is bent in three steps, upper, middle, and lower, so that the irradiance received by the sample is substantially equal, is attached to the entire periphery of the sample holder (6'). The test temperature is measured by a black panel temperature control sensor (7 ') attached to the sample holder (6') at substantially the same position as the sample. The temperature of the sensor circulates through the radiant heat of the light source (3 ') and the inside of the test tank (2'), and circulates air flowing at a constant air flow between the sensor surface (that is, the sample surface) and the back surface (that is, the sample back surface) (in the figure). (Indicated by an arrow). Further, the sensor (7 ') transmits a temperature output to a temperature setting controller (not shown) provided outside the test tank via a slip ring mechanism (not shown), and circulates air so as to reach the set temperature. A heater (14 ') and a cooler (15') for determining the temperature are operated. Also, (2
6) is a rotating mechanism for rotating the rotating frame, (27) is a refrigerator connected to a cooler, (24 ') is a blower for circulating air in the test tank, and (25') is for cooling the light source. Circulating water pipe.

[0003]

Even when weathering tests are performed on various materials and products under the same irradiation conditions, humidity conditions, rainfall conditions, and the like, the degree of deterioration differs depending on the test temperature, for example. Therefore, the weather resistance tester has a structure in which various conditions such as irradiation conditions (for example, irradiation wavelength range and irradiation intensity) of the light source, test temperature and humidity, and rainfall can be changed. In the weather tester shown in FIG. 3, the test temperature can be changed by changing the irradiation intensity of the light source and the circulating air temperature. For example, the irradiation intensity can be increased by increasing the output of the light source or changing the distance between the sample and the light source, and the circulating air temperature can be adjusted by using a heater or a cooler. However, since such a weather tester is configured so that all samples can be tested under the same conditions, it was not possible to apply different test conditions to each sample or each sample group at the same time and to perform the test as it is.

[0004] Nowadays, the market is demanded for products having better weather resistance, and a great deal of effort has been devoted to its development.
The most important issue in product development is how to conduct a weather test efficiently in a short time. For this reason, the same sample is often tested under different test conditions, and even if the types of products to be tested are small, tests under different conditions are performed simultaneously and in parallel to shorten the development period. The need for a weather tester has led to a significant increase in development costs. For this reason, there has been a strong demand for the development of a weather resistance tester that can simultaneously perform tests at different temperatures during the test conditions of the weather resistance test.

[0005]

In order to solve the above-mentioned problems, a light source provided in the center of a test tank, a rotating frame rotating around the light source around the light source, and a sample mounted on the entire circumference of the rotating frame are provided. A plurality of sample holders folded in multiple stages so that the irradiances received by the sample holders are substantially equal to each other, and a temperature controller for controlling the temperature of circulating air in the test tank, wherein at least one sample holder in the sample holders is provided. A black panel temperature control sensor is attached to each stage, and a plurality of plates of the same shape arranged in the vertical direction in order to individually adjust the amount of air flowing on the back surface of each stage of the sample holder attached around the rotating frame. The horizontal cross-sectional shape is substantially similar to the horizontal cross-sectional shape of each of the steps, and is integrally combined so as to surround the rear of the step, and all the plates can be simultaneously operated in a fixed angle range in the horizontal direction. Wind direction A group of plates, a temperature setting device for setting a control temperature of a black panel temperature control sensor attached to one of the stages of the sample holder, and a test tank so that the temperature indicated by the black panel temperature control sensor becomes the set temperature. Temperature control means for adjusting the temperature in the inside, each temperature setting device for setting the adjustment temperature of each black panel temperature adjustment sensor attached to each other stage of the sample holder, and the indicated temperature of each black panel temperature adjustment sensor And a wind direction plate operation adjusting means for integrally operating the wind direction adjustment plate group so as to reach the respective set temperatures.

[0006] With this configuration, the test temperature of the sample of the weathering tester is determined by the radiant heat of the light source and the temperature of the circulating air that circulates in the test tank and flows on the sample surface and the sample back surface at a constant air volume. Therefore, the back surface of the sample holder at each step is surrounded by a group of air flow direction adjustment plates, which can be operated integrally, and the amount of air flowing through the back surface of the sample holder at each step can be adjusted, so that the sample attached to the sample holder can be adjusted. Is different for each step.

That is, first, the wind direction adjusting plate group of any of the stages is adjusted to adjust the amount of air flowing on the back surface of the sample holder of the stage to a predetermined amount, and the temperature of the black panel attached to the stage of the sample holder is adjusted. Activate the temperature control means so that the indicated temperature of the sensor becomes the set temperature of each temperature setter, and in this state, the temperature of each black panel temperature control sensor attached to the other stage of the sample holder changes the temperature of each temperature setter. By operating the respective wind direction adjusting plate groups integrally so as to reach the instructed temperature, the sample temperature of each step can be adjusted.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a weather tester (1) of the present invention.
An embodiment will be described with reference to the drawings. FIG. 1 shows a main configuration of a weather tester (1) of the present invention. Here, a sample holder bent in three steps is used. The configuration of the entire tester is substantially the same as that of FIG.

In the figure, a 7 kW xenon arc lamp is suspended as a light source for a weather resistance test (3) at the center of a test tank (2), and a rotating frame (4) that rotates about this is provided. (The rotating mechanism of the rotating frame is not shown, see FIG. 3). On the entire circumference of the rotating frame (4), a deformed U-shaped sample holder (6) bent in three steps, upper, middle, and lower, so that the irradiance of the light source (3) received by the sample (5) is substantially equal. Installed.

In the present embodiment, the sample holder (6) has a size such that a sample (5) having a length of about 150 mm and a width of about 70 mm is mounted on each step, and the upper and lower steps are each about 31 mm from the middle step. 。It is inclined. The size of the rotating frame (4) is such that when the sample holder (6) is mounted, the distance L between the center of the middle stage of the holder and the center of the light source (3) is about 290 mm. Further, a black panel temperature control sensor (7) is attached to each of the upper, middle, and lower tiers of the sample holder (6) so as to be substantially at the same position as the sample surface.

The temperature output of the black panel temperature control sensors (7) at each stage is obtained by a slip ring mechanism (9) attached to a rotating shaft (8) for rotating the rotating frame (4).
Temperature setting device for each stage provided outside the test tank via
The upper temperature setting device (10), the middle temperature setting device (11), and the lower temperature setting device (12) are communicated. In the actual apparatus, the signal line (13) of each black panel temperature control sensor (7) is wired in a pipe (not shown) constituting a support of the rotating frame (4), and slips via a rotating shaft (8). The information is transmitted to the ring mechanism (9).

Further, temperature setting devices (10), (11),
Either of (12) is a heater (14) and a cooler (1) for adjusting the temperature of the circulating air (see the arrow in FIG. 3).
5), where the lower temperature setter (12)
The black panel temperature control sensor (7) attached to the lower stage of the sample holder (6)
These are controlled so as to reach the temperature set in 2). Further, the upper temperature setting device (10) and the middle temperature setting device (11) are connected to respective drive motors (described later), and when testing at the temperature set in the lower temperature setting device (12), Black panel temperature control sensor (7) mounted on upper and middle stages of sample holder (6)
By operating the respective drive motors so as to reach the respective set temperatures, the inclination angles of the upper stage wind direction adjustment plate group (16) and the middle stage wind direction adjustment plate group (17) (described later) are variably adjusted.

A wind direction adjusting plate is provided behind the upper, middle, and lower portions of the sample holder (6) attached to the entire periphery of the rotary frame (4). Each group is arranged. FIG. 2 is a horizontal sectional view taken along the line AA 'of FIG. 1 (a black panel temperature control sensor is not shown). In this figure, a middle-stage wind direction adjusting plate corresponding to the middle stage and the lower stage of the sample holder (6) is shown. A group (17) and a lower stage wind direction adjusting plate group (18) are shown, and the horizontal sectional shape of each wind direction adjusting plate group is the horizontal sectional shape of the sample holder (6) attached to the entire circumference of the rotating frame (4). It has a similar shape. Although not shown, the upper-stage wind direction adjustment plate group (1
6) is also substantially similar to the horizontal cross-sectional shape of the sample holder (6).

In this embodiment, a drive shaft (19) is fixed horizontally at substantially the center of the plate in each stage, and an end of the drive shaft (19) is connected to a connecting bracket (not shown). ). For example, metal fittings having pins fixed to both ends of the spring may be attached to the connecting metal fittings so as to fit into notches provided at the end of the drive shaft (19). The angle can be changed by bending, and as described above, it can be integrally formed in a substantially similar shape.

Therefore, when the drive shaft (19) is rotated about its axis, each plate is integrally inclined at the same angle with respect to the vertical line at the same time. A substantially U-shaped column (20) is provided between the plates vertically from a column receiver (not shown), and the drive shafts (19) are connected by a space in the column (20). The attachment and detachment of the sample holder (6) is performed by compressing a connection fitting made of a spring of the connection part (21) to remove the pin from the cutout part, and removing the plate of the wind direction adjustment plate group. The support (20) also functions as a wind shield.

Further, the connecting portion (2) of the drive shaft (19)
In 1), a drive motor (22) is provided outside the test tank at a position corresponding to one of the connecting portions (21) of the upper stage wind direction adjusting plate group (16) and the middle stage wind direction adjusting plate group (17) ( The drive motor for the upper wind direction adjustment plate is not shown). Although not shown in detail, the connecting portion (21) has a rotation operating mechanism (23) including gears and the like, and the driving motor (2)
In connection with 2), the rotation angle changes the inclination angles of the upper and middle wind direction adjusting plates.

The length of each wind direction adjusting plate group is substantially the same as the length of each stage of the sample holder (6). The positional relationship between the sample holder (6) and each wind direction adjusting plate group is determined by the upper wind direction. The lower end of the adjusting plate group (16) and the lower end of the upper portion of the sample holder (6) are located on substantially the same plane, and the upper ends of the middle and lower wind direction adjusting plate groups (17) and (18) are located on the sample holder (6). ) It is arranged so as to be located on substantially the same plane as the upper end of the middle section and the lower section.

The distance between each step of the sample holder (6) and each wind direction adjusting plate group (16), (17), (18) is determined by the center of each plate of each wind direction adjusting plate group and the sample holder (6). At the distance from the center of each step, the distance between the upper wind direction adjustment plate group (16) and the sample holder (6) upper stage is about 45 mm, and the middle wind direction adjustment plate group (17) and the sample holder (6) middle stage The distance is about 45
mm, and the distance between the lower wind direction adjusting plate group (18) and the lower portion of the sample holder (6) is about 55 mm.

In this embodiment, the lower-stage wind direction adjusting plate group (1)
The inclination angle a1 of 8) is set to 30 °, and the lower temperature setting device (1) is set so that the adjustment temperature of the black panel temperature adjustment sensor (7) attached to the lower portion of the sample holder is 63 ± 3 ° C.
Set 63 ° C in 2) and set 70 ° C in the middle temperature setter (11).
The temperature was set to 75 ° C. in the upper temperature setting device (10), and the test was started.

At this time, as shown in FIG. 1, the middle stage wind direction adjusting plate group (17) slightly moves about its inclination angle a2 of about 10 °, and the temperature of the black panel temperature adjustment sensor is 70 ± 3.
° C, the upper wind direction adjusting plate group (16) was slightly moved about its inclination angle a3 about 15 °, and could be controlled at 75 ± 3 ° C by the temperature of the black panel temperature control sensor. In FIG. 1, (2
4) a blower for circulating temperature-controlled air in the test tank;
(25) is a circulating water pipe for cooling the light source.

[0021]

According to the present invention, in a weather tester,
The upper, middle, and lower samples attached to the sample holder in the same test in the same test tank can be tested under different temperature conditions. Therefore, the time required for product development research can be reduced, and the cost required for weathering tests can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of a weathering tester of the present invention.

FIG. 2 is a horizontal sectional view taken along line AA ′ of FIG. 1;

FIG. 3 is a configuration diagram of a conventional weathering tester.

[Explanation of symbols]

 Reference Signs List 1, 1 'weatherproofing machine 2, 2' test tank 3, 3 'light source 4, 4' rotating frame 5 sample 6, 6 'sample holder 7, 7' black panel temperature control sensor 8 rotating shaft 9 slip ring mechanism 10 upper stage Temperature setting device 11 Middle temperature setting device 12 Lower temperature setting device 13 Signal line 14, 14 'Heater 15, 15' Cooler 16 Upper air direction adjusting plate group 17 Middle air direction adjusting plate group 18 Lower air direction adjusting plate group 19 Drive shaft 20 Prop DESCRIPTION OF SYMBOLS 21 Connecting part 22 Drive motor 23 Rotation operation mechanism 24, 24 'Blower 25, 25' Circulating water pipe 26 Rotation mechanism 27 Refrigerator

Claims (1)

[Claims] 1. A light source (3) provided at the center of a test tank (2).
And a rotating frame (4) that rotates around the light source (3), and mounted around the entire circumference of the rotating frame (4), and folded in multiple steps so that the irradiance received by the sample (5) is substantially equal. In a weathering tester provided with a plurality of sample holders (6) and a means for controlling the temperature of circulating air in a test tank, (A) at least one sample holder (6) in each stage of the sample holders (6) Black panel temperature control sensor (7)
(B) The rotating frame (4) The sample holder attached to the entire circumference (6) In order to individually adjust the air volume flowing on the back surface of each stage for each stage, a plurality of identically arranged vertically The plates are integrally combined so that their horizontal cross-sectional shape is substantially similar to the horizontal cross-sectional shape of each step, and surround the rear of the step, and all the plates are simultaneously in a fixed angle range in the horizontal direction. A group of wind direction adjusting plates that can be operated (16), (17), (18)
And (C) temperature setting devices (10), (11), and (12) for setting the adjustment temperature of the black panel temperature adjustment sensor (7) attached to any stage of the sample holder (6).
(D) temperature control means for adjusting the temperature in the test tank so that the temperature indicated by the black panel temperature adjustment sensor (7) becomes the set temperature; and (E) the sample holder (6).
Each temperature setting device (10) for setting the adjustment temperature of each black panel temperature adjustment sensor (7) attached to each of the other stages;
(11), (12), and the wind direction adjusting plate groups (16), (17), (18) of the respective stages so that the temperature indicated by each of the black panel temperature adjustment sensors (7) becomes the set temperature. What is claimed is: 1. A weather tester comprising: a wind direction plate operation adjusting means that operates integrally.