JPH04303606A - Rotary sampling device of powder and granular material - Google Patents

Abstract

PURPOSE:To provide a sampling device of powder an granular material such as resin pellets or the like, the exactly fixed quantity of which is collected so as to be automatically pressure-fed to the specified site apart from the sampling location. CONSTITUTION:In a bar-like main body 4, at the side of which a material collecting port 7 is provided, within which a pressurizing gas introducing passage 25 and a material discharging passage 21 are provided and which is mounted to a powder and granular material storing device 1 such as a hopper drier or the like so as to be inserted in powder and granular material layer 13 through the outer wall face 1a of the device 1, a mass table 8, on which a metering hole 8a to fill powder and granular material therein and a scraper 22 to scrape off the excess portion of the powder and granular material filled in the metering hole 8a of the mass table 8 are disposed. The device concerned is so constituted as to collect sample by driving the mass table 8 to rotate with a rotary actuator 12 under the condition that the powder and granular material is filled through a material collecting port 7 in the metering hole 8a by placing said mass table 8 at material collecting position and then to pressure-feed and discharge said sample through the material discharging passage 21 by feeding pressurizing gas into said pressurizing gas introducing passage 25 through the actuation of a pneumatic force controlling means 2.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a rotary type sampling device for powder and granular materials, and in particular, a rod-shaped body having a rotary type mass table is inserted from the outer wall surface of a powder and granule material storage device, and the mass table is The present invention relates to a sampling device that automatically extracts a part of powder material by force-feeding and discharging it by rotating and supplying pressurized gas.

0002

[Background Art] Generally speaking, taking resin materials as an example, if the moisture content of the resin material is inappropriate, defects such as silver lines and voids will occur in the molded product, so the moisture content should be kept at an appropriate value. This is extremely important from the perspective of quality assurance of resin molded products. For this reason, a method has conventionally been adopted in which the resin material is passed through a hopper dryer and dried for a certain period of time before being supplied to the molding machine.

However, since the moisture content of resin materials varies depending on the season and other conditions, it is not always possible to maintain the same moisture content even after drying for a certain period of time. There was the trouble of having to measure the drying rate and adjust the drying conditions, such as the heating temperature in the hopper dryer, according to the measured value.

By the way, resin material manufacturers perform quality control by checking the moisture content at the time of shipment, but this is all done manually by workers, which is time-consuming and difficult to automate.

However, in order to measure the moisture content, it is necessary to periodically sample the resin material that is sequentially supplied, and it is desired to save labor and automate such sampling work. However, at present, except for resin material manufacturers, the moisture content is checked only by sampling, and the number of checks is decreasing.

[0006] In addition, the moisture content of a resin material is generally calculated from the weight of moisture contained in the sampled resin material. This should not be the case, and highly accurate quantitative sampling is required.

[0007]

[Problems to be Solved by the Invention] The present invention was developed in view of the above circumstances, and provides a sampling device that can automatically and quantitatively sample powder and granular materials such as resin materials to be heat-treated in an accurate manner. is intended to provide.

[0008]

[Means for Solving the Problem] In order to achieve the above object, the rotary sampling device for powder and granular material of the present invention proposed in claim 1 has a material sampling port on the side and , a rod-shaped body provided with a pressurized gas introduction passage and a powder/granular material discharge passage inside thereof, and installed by being inserted into the powder/granular material layer from the outer wall surface of the powder/granular material storage device; A mass table that is rotatably attached to the tip and has a measuring hole formed therein to be filled with the powder or granular material collected through the material sampling port, and a surplus of the powder or granular material that is filled into the measuring hole of this mass table. a scraper for scraping off the liquid; a rotary actuator that rotates the mass table so that the measuring hole of the mass table is switched from the material sampling position to the material discharge position; The apparatus is configured to include a pneumatic control means for supplying pressurized gas into the pressurized gas introduction path to forcefully discharge the granular material filled in the measuring hole of the mass table through the material discharge path. .

The rotary sampling device for powdery material of the present invention has a structure in which the drive source of the rotary actuator is rotationally driven by pressurized gas (
In claim 2), it is also possible to adopt a configuration in which the rotation is driven by driving a motor (claim 3).

[0010] Furthermore, a plurality of measuring holes may be formed in the mass table, and in this case, the powder or granular material filled in each of the plurality of measuring holes formed in the mass table is sequentially pumped. In this case, the rotary actuator and the energy control means may be controlled in conjunction with each other (
Claim 4).

Furthermore, in the present invention, the sampling amount can be easily changed by changing the volume of the measuring hole of the mass table. We are meeting these demands.

0012

[Function] According to the rotary sampling device for powder and granular materials of the present invention, as shown in FIG. When inserted into the powder material layer in the powder material storage device, the powder material enters the measuring hole of the mass table from the material sampling port of the rod-shaped body (FIG. 6).

[0013] At this point, when the rotary actuator is driven to rotate the metering hole of the mass table to the material discharge position, the scraper scrapes the excess material at the top of the metering hole while the mass table is rotating. Since the powder and granule material is scraped off (FIG. 5), the powder and granule material filled in the measuring hole until it is completely worn out moves to the connection port of the material discharge path. In this way, when the gas pressure control means is activated after moving the metering hole of the mass table to the position where it connects with the connection port of the material discharge path, pressurized gas is supplied into the pressurized gas introduction path. The granular material filled in the measuring hole of the mass table is forced to be discharged to the outside through the granular material discharge path by pressurized gas, and quantitative sampling is performed (see FIG. 7).

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In this example, a resin material stored and dried in a hopper dryer is used as the powder material.

As shown in FIGS. 2 and 3, the sampling device A has a material sampling port 7 on the side of the tip, and a hopper dryer mounted on the top of the resin molding machine 26 at the tip. A rod-shaped main body 4 having a structure provided with a pointed cap part 9 so as to be easily inserted into the resin material layer 13 in the hopper dryer 1 is inserted into a guide cylinder 6 provided by penetrating the side wall 1a of the hopper dryer 1. , through which it can be slid freely with adjustment screws 5 (see arrows in FIG. 2). At this time, the material sampling port 7 is inserted into the resin material layer 13 in the hopper dryer 1 in a buried state. In addition, the rod-shaped main body 4 and the guide tube 6 and the guide tube 6 and the hopper dryer 1
An elastic sealing material (not shown) is interposed between the side wall 1a and the side wall 1a to maintain airtightness.

Further, inside the rod-shaped body 4, a pressurized gas introduction passage 25 consisting of a hollow pipe 11 whose one end is fixed to the rotating shaft 12a of the rotary actuator 12, and a material discharge passage 21 consisting of a hollow pipe 20 are longitudinally provided. The other end of the pressurized gas introduction path 25 communicates with the measuring hole 8a of the mass table 8, and the connection is formed so as to protrude from the center of the mass table 8. Short tube 25d
The connection port 21a of the material discharge path 21 is connected to the
When the metering hole 8a of the mass table 8 is rotated to the material discharge position shown in FIG. It has become. Here, the pressurized gas introduction path 25 connects the flexible hose 25 to the air pressure control means 2 constituted by a compressor or the like through its connection port 25a.
A, and when the pneumatic transport means 2 is operated, dried nitrogen gas or dry air is supplied, and the material discharge path 21 is connected via a flexible hose 21, which will be described later. It is connected to a moisture measuring station 3.

The mass table 8 in which the measuring hole 8a is formed is
Since it is rotatably supported by a bearing 10 within a cap portion 9 provided at the tip of the rod-shaped main body 4, when the rotating shaft 12a of the rotary actuator 12 rotates, the measuring hole 8a is moved from the material sampling position shown in FIG. It is possible to switch to the material discharge position shown in FIG. Here, the rotary actuator 12 has a configuration in which the rotating shaft 12a is rotationally driven by pressurized gas supplied from the air pressure control means 2, but it may also be configured to be rotationally driven by a solenoid or a motor. In particular, if a configuration is adopted in which the mass table 8 is rotationally driven by a motor, the mass table 8 can be rotated at a low speed, which is advantageous because it does not damage the sampled resin material B even when it is immersed in the resin material layer 13. .

FIG. 4 shows a plan view of the mass table, and a scraper 22 is provided on the rod-shaped main body 4 side to scrape off excess resin material B filled in the measuring hole 8a when the mass table 8 rotates. ing. This scraper 22 has a sharp tip, and is housed in a recess 18a formed in a semicircular fixing plate 18 provided on the rod-shaped main body 4, as shown in FIGS. 4 and 5. Since the structure is elastically supported by the spring 23, when the mass table 8 is rotated, the excess resin material B raised from the measuring hole 8a can be scraped off without causing any damage.

FIG. 3 shows an overall diagram of an online moisture management control system for pellet-shaped resin materials constructed using the sampling device A of the present invention. In this system, the sampling device A of the present invention is installed on the side wall 1a of the hopper dryer 1 storing pellet-like resin material as shown in FIG.
The tip 9 with the material sampling port 7 opened is immersed in the resin material layer 13 in the hopper 1. The pressurized gas introduction path 25 and the material discharge path 21 are
Both are connected via flexible hoses 25A and 21A to a pressure control means and a moisture measuring device (not shown) installed in the moisture measuring device 3 constituting the moisture measuring station. Here, the moisture measuring station 3 has a built-in moisture measuring device that calculates the moisture content extracted by heating the sampled resin material B using, for example, a colorimetric measurement method using a Karl Fischer reagent. When the resin material B is sampled by the sampling device A, the moisture content is automatically measured by the moisture meter.

[0020] In addition, in this moisture management system, the moisture content of the resin material B sampled by such a method is sequentially measured. The moisture content of the resin material may be arbitrarily controlled by automatically controlling the heater temperature and air volume of the dryer. In such a system, the moisture content of the resin material B sampled at any time can be reduced without the need for human intervention. The moisture content of the resin material B can be controlled by a so-called online method in which the moisture content of the resin material is measured and maintained at a constant value according to the measured value.

Next, the operation of the sampling device A of the present invention will be explained. A rod-shaped main body 4 is attached to a side wall 1a of a hopper dryer 1 or the like using a guide tube 6 or the like. At this time, the mounting position with respect to the guide tube 6 is adjusted so that the material sampling port 7 formed at the tip of the rod-shaped main body 4 is completely immersed in the resin layer 13 in the hopper dryer 1.

When sampling the resin material B from within the resin material layer 13, the rotary actuator 15 is driven to rotate the mass table 8 from the material sampling port position to the material discharge position with its metering hole 8a. Then, when in the material sampling position, the measuring hole 8a is inserted through the material sampling port 7.
After the excess amount of the resin material B filled in is scraped off by the scraper 22, the resin material B is passed through the connection port 21a of the material discharge path 21.
is joined to. At this point, if the pressure control means 2 is operated to supply pressurized gas into the pressurized gas introduction path 25, the supplied pressurized gas will be passed through the communication path 25c to the mass table 8.
The resin material B filled in the measuring hole 8a is forced to be fed to the moisture measuring station 3 through the material discharge path 21.

After the resin material B filled in the measuring hole 8a of the mass table 8 is pumped to the moisture measuring station 3 in this way, the rotary actuator 12 is returned to the material sampling position, and the mass table 8 measuring hole 8
After filling the resin material B, if the rotary actuator 12 is rotated in the same manner as described above, the metering hole 8a of the mass table 8 filled with the resin material B can be joined to the material discharge path 21. By activating the air pressure control means 2 and supplying pressurized gas, the resin material B sampled in the same manner as described above can be successively fed under pressure to the moisture measuring station 3.

[0024] Following the same procedure, the rotary actuator 12 is driven to rotate, and then pressurized gas is repeatedly supplied by the pneumatic control means 2, thereby removing the pellet-like resin material from the inside of the hopper without requiring any human intervention. can be sampled automatically.

It should be noted that the specific configuration of each part according to the present invention is not limited to those of the above-mentioned embodiments. For example, the number of measuring holes 8a formed in the mass table 8 is not limited to one, and a plurality of measuring holes may be provided. In this case, the rotation control of the mass table is
If pressurized gas is supplied by the pneumatic control means each time each measuring hole is rotated from the material sampling position to the material discharging position, the resin material B filled in the measuring hole of the mass table will be
Sequential sampling is possible.

Furthermore, a structure may be adopted in which a plurality of mass tables having measuring holes with different volumes are prepared in advance and are detachably attached to the tip of the rod-shaped main body 4.

[0027]

[Effects of the Invention] According to the sampling device of the present invention, the rod-shaped body is set in the powder material layer to be sampled, and the rotation control of the rotary actuator and the supply control of the pressurized gas by the pneumatic control means are repeated. By doing this, it is possible to quantitatively sample the granular material without requiring any manual labor. Therefore, if it is used to measure the moisture content of resin materials, sampling work can be automated and labor can be reduced.Moreover, it has excellent quantitative properties, so it has the advantage of being able to perform moisture measurements with high precision and contributing to improving the functionality of moisture management systems. be. In addition, by attaching this sampling device to a material tank just before shipping and performing sampling, moisture management during shipping can be automatically performed (ensuring shipping quality and automation).

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a main part longitudinal cross-sectional structure showing an embodiment of a sampling device of the present invention.

FIG. 2 is a diagram showing the installed state of the sampling device of the present invention.

FIG. 3 is an external view when the sampling device of the present invention is used in an online moisture management system.

FIG. 4 is a plan view of the mass table.

FIG. 5 is a vertical cross-sectional view of a main part of the mass table showing a scraper.

[Figure 6] Material collection state of mass table (material collection position)
FIG.

[Figure 7] Material discharge state of mass table (material discharge position)
FIG.

FIG. 8 is an explanatory view of the tip of the sampling device of the present invention showing the material sampling port.

[Explanation of symbols]

A...Sampling device of the present invention B...Resin material 1 Hopper dryer 1a... Its side wall 2... Energy control means 3...Moisture measurement station 4...rod-shaped body 7...Material sampling port 8...Mass table 8a...Measuring hole 21...Material discharge path 25... Pressurized gas introduction path 13... Powder material layer

Claims (5)

[Claims] [Claim 1] A material sampling port is provided on the side, and a pressurized gas introduction path and a powder material discharge path are provided inside,
A rod-shaped body is inserted into the powder and granule material layer from the outer wall surface of the granular material storage device, and the powder is rotatably attached to the tip of the rod-shaped body and collected through the material sampling port. A mass table in which a measuring hole is formed for filling the granular material, a scraper for scraping off the surplus of the granular material filled in the measuring hole of the mass table, and a material sampling port side of the measuring hole of the mass table. In order to switch from the material sampling position to the material discharge position connected to the connection port of the powder material discharge path, a rotary actuator rotates the mass table, and in conjunction with the rotational operation of this rotary actuator, the pressurization The powder is characterized by comprising: pneumatic control means for supplying pressurized gas into the gas introduction path to forcefully discharge the granular material filled in the measuring hole of the mass table through the material discharge path. Rotary sampling device for granular materials. 2. The rotary sampling device for powdered or granular material according to claim 1, wherein the rotary actuator is configured to be rotationally driven by supply of pressurized gas. 3. The rotary sampling device for powdery material according to claim 1, wherein the rotary actuator is configured to be rotationally driven by a motor. 4. A plurality of metering holes are formed in the mass table, and the rotary actuator and the pneumatic control means are formed in the mass table by controlling rotation and supplying pressurized gas. 4. The rotary sampling device for granular material according to claim 1, wherein the granular material filled in the plurality of measuring holes is pumped and discharged through the material discharge path. 5. The rotary sampling device for powdered or granular material according to claim 1, wherein a mass table having a measuring hole having a different volume is removably attached to the tip of the rod-shaped main body.