JP2001252963A - Apparatus for removing volatile dispersed substance for resin molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for removing volatile dispensed substances for a resin molding machine in order to remove the volatile dispersed substances which can be collected easily to be rejected. SOLUTION: The apparatus is provided with a treatment gas suction apparatus 60 which is attached to the resin molding machine for producing a resin film, sucks treatment gas 70 containing the volatile dispersed substances generated by the molding machine, and discharges air, an electrical dust precipitator 30 having a treatment gas duct through which the treatment gas 70 passes, a pair of electrodes arranged in the gas inflow part of the duct, and a direct current power source device 10, and a heating device 50 for heating the treatment gas 70 at a prescribed temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to polyethylene, polypropylene, polyethylene terephthalate and nylon.
Suitable for removing volatile scattered matter such as residual monomers, oligomers, additives, etc. in equipment for manufacturing plastic films such as 6, nylon-6.6, etc., especially installed around the extruder for molten resin. The present invention relates to a volatile scattered matter removing device for a resin molding machine.

[0002]

2. Description of the Related Art In general, in producing a plastic film (film-shaped resin molded product), a method of extruding a molten resin from a die portion of a die has been adopted. When the molten resin is extruded, volatiles (also referred to as volatile scattered substances or volatile substances) are generated from the molten resin in the vicinity of the die portion of the die. Therefore, techniques for removing such volatiles have been developed.

For example, Japanese Utility Model Publication No. 4-137820 discloses that
As shown in FIG. 6, the base 103 of the apparatus (resin molding machine)
There is disclosed a technique in which suction ducts 120 and 121 for sucking volatiles are disposed in the vicinity, and a pump 123 sucks and removes volatiles generated from the vicinity of the base 103. In FIG. 6, 101 is a filter, 102 is an adapter, 104 is a manufactured plastic film, 105
Is a cooling roll, 106 is a take-up roll, 107 is an air knife, and 108 is a blower for an air knife.

Japanese Patent Application Laid-Open No. 4-201432 discloses a technique for removing volatiles generated in a stretching apparatus that preheats, stretches, heat-sets, and cools a formed film by using hot air whose temperature is controlled. As disclosed, a method of efficiently removing volatiles and recirculating hot air by a combustion method using a high-temperature heat exchanger has been proposed. Also,
As disclosed in Japanese Utility Model Application Laid-Open No. 1-48129 and Japanese Utility Model Application Laid-open No. 1-46216, it is possible to stabilize by installing a heat-resistant filling layer and a porous membrane in a part of a route for circulating hot air. A technique for removing volatiles from hot air has also been proposed.

[0005]

However, in the technique for removing volatile matter (volatile scattered matter) by suction as disclosed in Japanese Patent Application Laid-Open No. 4-137820, the suction port, the inside of the suction duct, the blower, etc. There are problems such as the necessity of periodically disassembling and cleaning the device due to the accumulation of volatiles, and the problem of easily inducing trouble or failure of the blower.

Further, in the technique of removing volatiles by burning in a stretching apparatus as disclosed in Japanese Utility Model Publication No. 1-48129 and Japanese Utility Model Publication No. 1-46216, a stretching apparatus is used for a polyolefin resin such as polyethylene or polypropylene. Since the hot air temperature is as low as about 160 ° C, a sufficient combustion effect cannot be obtained, so it is necessary to raise the temperature using a separate utility to increase the combustion effect,
There is a problem that running costs are high,
There is a problem that sufficient removal performance cannot be obtained due to the poisoning of the catalyst surface, and a problem that exhaust treatment, flame prevention measures, and the like may be required because the removal method involves combustion.

[0007] On the other hand, Japanese Patent No. 2545774 discloses a filter that simply uses a filter (using a porous membrane) to remove these foreign substances such as oligomers, and uses a heat-resistant filling tank such as an adsorbent. Is Tokuhei 03-0098
No. 53, etc. An apparatus using an electric precipitator is disclosed in JP-A-04-035952.
The electric dust collector itself is disclosed in Japanese Patent No. 2505919. Further, regarding a duct of an electric dust collector, a duct having a rectangular cross section is disclosed in Japanese Patent Application Laid-Open No. 56-1290.
No. 46.

However, in the above-described removal method using a heat-resistant packing layer or porous film, clogging occurs due to continuous use, and the removal performance cannot be maintained. There is a problem of affecting circulation. In the case of using the above-mentioned electric precipitator, how to make a specific configuration of the electric precipitator becomes a problem, and the above-mentioned problem cannot be solved by the above-mentioned technology of the electric precipitator itself.

The present invention has been devised in view of the above-mentioned problems, and it is possible to prevent volatile scattered substances generated from a molten resin from accumulating in a collecting section around a resin extruder heated to a melting point or higher. Efficient removal, avoiding adverse effects on machines, catalyst poisoning, clogging, etc., ensure maintainability, easily collect and discard the removed volatile splatters It is an object of the present invention to provide a volatile splatter removal apparatus for a resin molding machine, which is capable of removing the scattered matter.

[0010]

In order to achieve the above object, a volatile splatter removal apparatus for a resin molding machine according to the present invention is an apparatus attached to a resin molding machine for producing a film-like resin molding. A processing gas suction device for suctioning and exhausting a processing gas that is air containing volatile scattered matter generated by the resin molding machine, a processing gas duct for passing the processing gas,
A pair of electrodes arranged at a gas inlet of the processing gas duct,
And an electric dust collector provided with a DC power supply for applying a voltage between the processing gas duct and the electrode, and a heating device for heating the processing gas to a predetermined temperature. Item 1).

It is preferable that the heating device heats the processing gas based on the target temperature with a target temperature being higher than the melting point temperature and lower than the boiling point temperature of the resin molded product. Further, the target temperature in this case is preferably set to a temperature higher by 10 ° C. than the melting point temperature of the resin molded product. Further, the heating device may be configured to include heating gas ducts alternately arranged in a direction orthogonal to the processing gas duct of the electric dust collector (claim 4), or the heating device may be configured to include An electric heater attached to a wall surface may be provided (claim 5), or the heating device may heat the processing gas by using waste heat discharged from an oven of the resin molding machine. (Claim 6).

Further, the processing gas suction device may be provided with a suction chamber device opened near the die outlet (claim 7), and is detachable below the electric dust collecting device. You may comprise so that a collection thing collection tank may be provided (claim 8).

[0013]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described with reference to the drawings. 1 to 5 show a volatile splatter removal apparatus for a resin molding machine according to a first embodiment of the present invention. FIG. 1 is a schematic configuration diagram illustrating the entire configuration, and FIG. FIG. 3 is a perspective view of a main part showing a state where the electric dust collecting device is incorporated in the main body, FIG. 3 is a schematic perspective view illustrating the configuration and principle of the electric dust collecting device, and FIG. FIG. 5 is a schematic diagram illustrating the process, and FIG. 5 is a graph illustrating an example of a dust collection experiment using the present apparatus.

As shown in FIG. 1, the volatile splatter removal apparatus for a resin molding machine according to the present embodiment includes a volatile splatter (hereinafter referred to as a volatile substance) generated near a die portion (die exit) 3 of the resin molding machine. ), A power supply device 10, a separation drum main body 20, an electric dust collector (hereinafter also referred to as an electric dust collector) 30 provided in the separation drum main body 20, and a collection tank unit (collection). (Collection collection tank) 40, a gas heating device (heating device) 50, and a processing gas suction device 60 provided near the base 3. In FIG. 1, 4 is a molten resin, 4A is a plastic film (film-shaped resin molded product) manufactured from the molten resin 4, 5
Is a cooling roll and 6 is a take-up roll.

First, the schematic structure of the present apparatus will be described. As shown in FIGS. 1 and 2, a supply port 23 is provided on a side of a separation drum main body 20, an exhaust port 24 is provided on an upper part, and an exhaust port is provided on a lower part. 25 are provided, and a duct unit 63 of the processing gas suction device 60 is connected to the supply port 23. In addition, an electric dust collecting device 30 is incorporated in the trunk center portion 21 of the separation drum main body 20. The electric dust collector 30 is provided with a processing gas duct (processing gas passage) 31 extending in the axial direction of the separation drum main body 20, and inside the processing gas duct 31, a processing gas (air containing volatile matter) 70 is separated. Body 20
It flows in the axial direction of.

A heating gas duct (heating gas passage) 34 is provided in the electric dust collector 30 in a direction perpendicular to the processing gas duct 31. A gas heating device 50 is connected via a heated gas supply / discharge port 28 to a built-in portion of the electric dust collecting device 30 in the separation drum main body 20, and a heating gas duct 34 of the electric dust collecting device 30 is heated by a heating gas duct 34. Flows to heat the processing gas flowing in the processing gas duct 31 in a direction orthogonal to the heating gas.

Next, each part of the apparatus will be described more specifically. The power supply device 10 uses a high-voltage DC power supply of a 10 kV class. This high voltage can be generated by a high voltage transformer, and it is desirable to use a high voltage DC power supply of about 10 kV ± 2 kV. Next, the separation drum main body 20 will be described. As shown in FIG. 2, the separating drum main body 20 is provided on a cylindrical drum central portion 21, a canopy 22 a provided on one side of the drum central portion 21, and provided on the other side of the drum central portion 21. It has a bottom lid 22b. These canopy 22a and bottom lid 22b (hereinafter collectively referred to as lid 22
) Are formed in a funnel shape whose diameter is reduced as the distance from the center portion 21 of the body is increased, and openings 24 and 25 are formed in the narrowest portions of the respective ends. Of these, the opening 24 formed in the canopy 22a functions as an exhaust port,
The opening 25 formed in the bottom lid 22b functions as a discharge port. In addition, an opening 23 that functions as a processing gas inlet is formed on the side of the bottom lid 22b.

Further, header chambers 26 and 27 are provided at substantially the center in the longitudinal direction (vertical direction in FIG. 2) of the trunk center portion 21 on both sides of the center of the trunk center portion 21.
These header chambers 26 and 27 are cavities formed in the side wall of the trunk center portion 21 by joining the partition member 29 bent into a box shape with one surface open and the wall surface of the trunk center portion 21. The reference numerals 26 and 27 are disposed so as to face each other across the center of the trunk center part 21. One header chamber 26 functions as an inlet header chamber into which heating gas enters, and the other header chamber 27
Function as an outlet header chamber from which the heated gas exits.

Openings 26a, 27 are formed in the surfaces of the partition members 29 of the header chambers 26, 27 facing each other.
a are provided so as to form a pair with each other. Further, the inlet header chamber 26 is provided with a heating supply port 28a, and the outlet header chamber 27 is provided with a heating gas discharge port 28b. The heating gas supply port 28a and the heating gas discharge port 28b are collectively referred to as a heating gas supply and discharge port 28. The header chambers 26 and 27 communicate with the outside via the heated gas supply / discharge ports 28.

Next, the electric dust collector 30 will be described. As shown in FIG. 2, the electric dust collector 30 has an integrated structure in which rectangular processing gas ducts (also referred to as collection cells) 31 and heating gas ducts 34 are joined alternately and in a direction orthogonal to each other. It has become. Thus, two kinds of gases, the processing gas 70 and the heating gas 100, flow in the respective gas ducts 31 and 34 in directions perpendicular to each other.

Such an electric dust collector 30 includes, for example, an insulator 35 between the heated gas duct 34 and the separation drum main body 20.
The heating gas duct 34 is supported by the insulator 35 and is incorporated in the separation drum main body 20. In particular,
The openings 26a, 27a of the header chambers 26, 27 and the heated gas duct 34 are arranged so as to be aligned with each other, and these joints are hermetically assembled.

The processing gas duct 31 is connected to the anode of the power supply 10 by the other one of the conductors 33 (positive conductor) 33a. In addition, upstream of the processing gas duct 31,
The electrode 32 is arranged at a predetermined distance from the end face of the processing gas duct 31, and one of the conductive wires 33 (a negative conductive wire) 3
3b is connected to the cathode of the power supply device 10. The electrode 32 is, for example, a partition member 2 of the header chambers 26 and 27.
9 can be attached to the end face via an insulator 36.

The function of the electric precipitator 30 will be further described. As shown in FIG. 3, the electric precipitator 30 has a processing gas duct 31 through which air (ie, processing gas) 70 containing volatile substances flows. And a heating gas duct 34 through which hot air (that is, heating gas) 100 for heating the processing gas flows, and the hot air (heating gas) 100 introduced for the purpose of heating is supplied to a heating gas supply port. The gas enters the separation drum main body 20 from 28a, passes through the heated gas duct 34, and is discharged from the heated gas discharge port 28b. This allows
The heating gas 100 flowing in the heating gas duct 34 heats the heating gas duct 34 and the processing gas duct 31 adjacent thereto, and the processing gas 70 flowing in the processing gas duct 31 can be heated to a predetermined temperature.

As a result, when the power supply device 10 is started, the processing gas duct 31 is positively charged and the electrode 32 is negatively charged as shown in FIG. An electrostatic field 37 is generated between them, and the corona discharge is generated here by the electrostatic field 37 because the power supply device 10 has a high voltage. When the processing gas 70 flows through the inside of such an electrostatic field 37, a mist component (also simply referred to as a mist) 80 in the processing gas 70 is negatively charged, and the electrostatic attraction of the electrostatic field 37 causes the mist component 80 on the wall of the processing gas duct 31. After being sucked, large droplets of the mist 80 are generated on the wall surface of the processing gas duct 31.

The material used for the processing gas duct 31 connected to the anode of the power supply device 10 to generate the electrostatic field 37 is preferably a material having conductivity and excellent heat conduction. If the volatile substance flowing in the processing gas duct 31 is corrosive, it is necessary to select a material that can withstand the processing gas duct 31.

Next, the recovery tank unit 40 will be described. As shown in FIG. 1, this collection tank unit 4
0 is a tank 41 and an on-off valve (for example, a ball valve) 42
And an observation window 43. That is, the separation drum main body 2
A tank 41 is provided through an on-off valve 42 at an outlet 25 provided below the bottom cover 22b. Bottom lid 22
Since “b” has a funnel shape, the liquid accumulated in the separation drum main body 20 can be easily collected in the tank 41. The observation window 43 is provided on the wall surface of the tank 41, and the collection situation can be easily observed by the liquid level in the tank 41 visually recognized through the observation window 43.

Next, the processing gas heating device 50 will be described. As shown in FIG. 1, the processing gas heating device 50 includes a heating device 51, a blowing device 52, and a duct 53. That is, the heating device 51 includes an electric heater or the like.
a is attached via a duct 53. Also,
The outlet of the blower 52 is provided toward the heating device 51.

As a result, the air sent from the outlet of the blower 52 is heated by the heater 51 and
3 through the heating gas supply port 28a, into the separation drum main body 20, and into the heating gas duct 34 of the electric dust collector 30.
Hot air is supplied to the processing gas to heat the processing gas. By supplying the hot air from the processing gas heating device 50, the inside of the electric dust collecting device 30, particularly the wall surface of the processing gas duct 31, is heated to a predetermined temperature, and the processing gas 70 is heated.
The mist component 80 in the inside is negatively charged and is attracted to the wall surface of the processing gas duct 31 by the electric attraction of the electrostatic field 37,
Large droplets 90 are generated on the wall surface of the processing gas duct 31.

Here, the target temperature for heating the electric precipitator 30 is about 10 ° C. higher than the melting point temperature of the trapping substance (ie, the mist component 80 in the processing gas 70 collected by the electric precipitator 30). The temperature is set to (the melting point of the trapping substance + about 10 ° C.), and a temperature detector (not shown) is provided in the processing gas duct 31 and the heating state of the processing gas heating device 50 is determined based on the temperature detected by the temperature detector. Control.

That is, when the trapping substance is heated to a temperature equal to or higher than the melting point in the electric dust collector 30, the trapping substance turns into a liquid and agglomerates and easily falls due to gravity. It will be easier. However, if the trapping substance is heated above the boiling point, the trapping substance vaporizes and cannot be collected. Therefore, it is necessary to heat the trapping substance to a temperature range from the melting point to the boiling point, but as the heating temperature approaches the boiling point, the trapping substance adhering to the electric precipitator 30 volatilizes and the free energy increases. As a result, a reduction in adhesion force and a reduction in removal efficiency such as re-scattering occur. Therefore, the target temperature for heating the electric dust collector 30 is higher than the melting point of the trapping substance by a predetermined temperature (about 10 ° C.) so that the trapping substance is heated to a temperature slightly higher than the melting point. Temperature (of course, a temperature sufficiently lower than the boiling point of the collected substance)
It is set to.

Next, the processing gas suction device 60 will be described. As shown in FIG. 1, the processing gas suction device 60
Has a suction chamber device 61, a blowing device 62, and a duct 63. The suction chamber device 61 is provided in the vicinity of the die outlet 3 and has an intake port 61 a opened in the vicinity of the die outlet 3. The suction chamber device 61 is provided with a duct 63a.
Is connected to the processing gas introduction port 23 of the separation drum main body 20 via the. On the other hand, the blower 62 is connected to the exhaust port 24 of the separation drum main body 20 via a duct 63b. The suction chamber device 61 is an intake chamber having an opening having a rectangular cross section over the width direction of the resin film flowing down the die outlet 3 as described in the conventional example.

Accordingly, the intake chamber device 61 and the blower 6
2 means a duct 63a, a separation drum main body 20, and a duct 63b.
When the blower 62 is operated, the pressure in the suction chamber device 61 is reduced, and the volatile scattered matter (volatile matter) scattered from the suction port 61a to the vicinity of the die outlet 3 is discharged from the suction port 61a. It is designed to inhale. And
The sucked volatiles are mixed into the air to form a processing gas 70, which is sent from the suction chamber device 61 to the separation drum main body 20, and the processing gas 70 is volatilized by the electric dust collector 30 in the separation drum main body 20. The volatile matter is separated into the matter and the air, and the volatile matter is collected in the collection tank unit 40, and the air from which the volatile matter has been removed is discharged to the outside from the blower 62.

At this time, the suction chamber device 61 simultaneously suctions the molten resin 4 immediately before becoming the plastic film 4A and presses it against the surface of the roll 5. Since the volatile scattered matter removing device for a resin molding machine as the first embodiment of the present invention is configured as described above, it operates as follows. First, when the blowing device 62, the blowing device 52, and the power supply device 10 are started, air (processing gas) containing volatile components is sucked from the suction chamber device 61 near the die outlet 3, and the processing gas is supplied to the electrode unit device 30. And heated by the gas heating device 50 at the same time.

At this time, since the power supply device 10 is activated, as shown in FIG.
The electrode is negatively charged, and an electrostatic field 37 is generated between the electrode 32 and the wall of the duct 31. Since the power supply device 10 has a high voltage and a large potential difference between the electrode 32 and the wall surface of the duct 31, a corona discharge occurs here due to the electrostatic field 37.

As a result, the mist component 80 of the processing gas 70 (that is, the volatile component gas) is negatively charged, and the mist component 80 has a polarity opposite to that of the mist component 80 due to the electric attraction of the electrostatic field 37. The positively charged wall of the processing gas duct 31 is successively sucked and repeatedly collides with the wall of the processing gas duct 31. In this process, large droplets 80 are generated on the wall surface of the processing gas duct 31 of the dust collection electrode system 30.

When the diameter of the droplet 80 increases in this way, the droplet 80 cannot be supported by the wall surface of the processing gas duct 31 due to surface tension, and falls against the gas flow. The dropped droplet is collected in the tank 41 of the collection tank unit 40. In particular, here, the target temperature at which the electric dust collector 30 is heated is set to a temperature about 10 ° C. higher than the melting point temperature of the trapping substance (that is, the mist component 80 in the processing gas 70 collected by the electric dust collector 30). (Melting point of collected substance + about 10 ° C)
Since the trapping substance is reliably heated to a temperature equal to or higher than the melting point and becomes liquid in the electric dust collector 30,
There is an advantage that the trapped substance is aggregated and easily dropped by gravity, so that the trapped substance can be easily collected in the lower collection tank unit 40. Further, since the trapping substance is not heated excessively as it approaches the boiling point, the trapping substance adhering to the electric precipitator 30 is volatilized and the free energy is increased. The collected material is efficiently collected without lowering the efficiency.

In the electric dust collecting apparatus 30, the processing gas ducts 31 and the heating gas ducts 34 are alternately and integrally arranged so as to be oriented in a direction orthogonal to each other. Since the gas flows in the respective gas ducts 31 and 34 in the directions perpendicular to each other, the inside of the processing gas 70 can be efficiently heated while the electric dust collector 30 is made compact, and Mist component (trapping substance) 8 in the processing gas 70
0 contributes to efficient recovery.

In particular, by forcibly sucking the air near the die 3 of the die, the volatile substances stay around the die 3 and do not agglomerate or drip on the film. It is possible to do. Further, the state of collection in the tank 41 can be observed as the liquid level in the tank 41 through the observation window 43 of the tank 41, so that it can be reliably recognized. The collection tank system 40
When a certain amount of the substance stored in the storage tank is stored, the on-off valve 42 is closed, and then the main body and the collection tank system 40 are separated to be discarded or reused.

Next, a second embodiment of the present invention will be described. This embodiment is different from the first embodiment in the heat source of the heating gas 100. In other words, although not shown, in the present embodiment, the suction gas of the gas heating device 50 allows the high-temperature gas in the oven of the resin molding machine and the gas lower than the high-temperature gas to be suctioned. The configuration is such that the temperature can be adjusted by appropriately adjusting the flow rate of the low-temperature hot gas, and waste heat discharged from the resin molding machine is used as a heat source instead of an electric heater.

With such a configuration, the same operation and effect as in the first embodiment can be obtained with high energy efficiency while utilizing the waste heat of the oven. Next, a third embodiment of the present invention will be described. Although not shown, in this embodiment, the heat source of the heating gas 100 is different from that of the first embodiment, and the heating gas duct 34 itself is provided with a heat source. That is, the heating gas duct 34 is constituted by a sheet heater, and the heating gas duct 34 of the sheet heater directly heats the surface of the processing gas duct 31 of the electric dust collector 30.

According to such a configuration, the same operation and effect as those of the first embodiment can be obtained, and the processing gas can be more efficiently heated. In this case, the processing gas duct 3
If a temperature detector is provided in the first or the planar heater (heating gas duct) 34 and a power regulator is provided in the planar heater, and the power of the planar heater is adjusted based on the temperature detected by the temperature detector, the processing can be performed. The gas temperature can be adjusted to a predetermined temperature.

Next, Table 1 shows the results of tests performed on a model substance of volatile scattered matter (volatile substance) using the volatile scattered matter removing apparatus for a resin molding machine of the above embodiment. . Note that ε-caprolactam, which is a raw material of nylon-6, was used as a model substance. The test is ε-
The caprolactam was heated to about 200 ° C. to generate volatiles, which were passed through the removal device. The removal rate in the removal device was calculated from the difference in volatile substance concentration between the inlet and outlet. For the measurement of the inlet and outlet concentrations, air containing volatile substances was suctioned at a constant speed in each part, and this was bubbled and dissolved in carbon tetrachloride and analyzed by FTIR to prepare the magnitude of absorption in advance. It was determined by reference to a calibration curve.

[Removal rate] = 1-([inlet concentration]-[outlet concentration]) / [inlet concentration] Table 1 shows each experiment in which the electric precipitator (electric precipitator) 30 of the present apparatus was turned on. In addition to the results of the examples, the results of the comparative examples under the same conditions as those of each experimental example except that the electric precipitator was turned off are also described. The flow velocity in the cell is the flow velocity of the processing gas 70 flowing in the processing gas duct (collection cell) 31.

[0044]

[Table 1]

In Experimental Example 1, the electric dust collector was operated at a collecting cell temperature of 40 ° C. and a flow rate of 1.25 m ³ / min (flow rate in the cell: 1.0 m / s). The removal rate at this time is 91.
5%. On the other hand, the removal rate of Comparative Example 1 in which the electric precipitator was stopped was 72.6%. From this, medium-level collection will be possible by installing something that has some type of collection function in the exhaust path of volatile substances, and more efficient removal of volatile substances will be possible by operating the electric dust collector. It turns out that it became.

Experimental Example 2 has a cell temperature of 40 ° C. and an air flow of 2.5 m.
The result when the electric precipitator was operated at ³ / min. The removal rate at this time was 87.2%. In contrast,
The removal rate of Comparative Example 2 in which the electric precipitator was stopped was 75.0%. It is considered that the removal rate of Experimental Example 2 was lower than that of Experiment 1 because the processing air volume was large and the flow velocity in the collection cell was high.

In Experimental Example 3, the cell temperature was 80 ° C., and the air flow was 1.2.
The result is obtained when the electric dust collector is operated at 5 m ³ / min. The removal rate at this time was 91.0%. On the other hand, the removal rate of Comparative Example 3 in which the electric precipitator was stopped was 76.5%. Experimental Example 4 shows the results when the electric dust collector was operated at a cell temperature of 80 ° C. and an air flow of 2.5 m ³ / min. The removal rate at this time is 6
It was 7.6%. In contrast, the removal rate of Comparative Example 4 in which the electric precipitator was stopped was 59.8%.

FIG. 5 is a graph of Experimental Examples 1-4 and Comparative Examples 1-4. As shown in FIG. 5, the removal rate tends to decrease under the condition of a large air flow. Further, it can be seen that the influence of the cell temperature is more remarkable when the cell temperature is higher (80 ° C.), and is more conspicuous when the air volume is large. Next, Table 2 shows the results of experiments (Experimental Examples 5 to 8) in which the state of collection on the collection cell under each condition was visually observed.

[0049]

[Table 2]

As shown in Table 2, Experimental Examples 5 and 6
In the case of, when the cell temperature is 40 ° C., the collected volatile scattered matter becomes solid and deposits on the collection cell, so that after a certain period of time, the collected substance may be re-scattered, A bridge is formed between the charging electrode and the collection cell to cause a spark due to a short circuit. In contrast, as shown in Experimental Examples 7 and 8, when the cell temperature was 80 ° C., the collected volatile scattered matter was in a liquid state. These are 5
When it grew to a diameter of about mm, it dropped to a collecting section provided below under its own weight. For this reason, the collection cell did not accumulate the trapped material and kept the initial surface state at all times, so that long-time continuous operation was possible. However, Experimental Example 8
In the test, the gas flow rate in the cell was twice as fast as that of Experimental Example 7, so that the once collected substance was re-scattered in the form of a mist.

Next, an experiment was conducted in which a test was conducted by installing the apparatus around the apparatus for actually extruding the molten resin (Examples 9 and 1).
The result of 0) is shown in 3. Here, the raw material is nylon-6
It was used. The volatile scattered matter generated from the molten resin was sucked by setting a suction type chamber near the base from which the molten resin comes out as shown in FIG. This suction nozzle was kept at an appropriate temperature by an embedded heater so that volatile scattered matter did not aggregate.

[0052]

[Table 3]

Experimental Example 9 shows the results when the electric dust collector was operated. At this time, the removal rate of the volatile substances was 93.0%. In addition, operation without maintenance for 150 hours was possible. Experimental Example 10 is a result when the operation of the electric dust collector was stopped. The removal rate at this time was 80.1%. In addition, it was confirmed that continuous operation with no maintenance for 150 hours was possible as in Experimental Example 9.

The present invention is not limited to the above-described embodiment, but can be implemented by variously modifying such an embodiment.

[0055]

As described above, according to the volatile scattered matter removing apparatus for a resin molding machine of the present invention (claim 1), a resin molding machine for producing a film-shaped resin molded product is produced by the resin molding machine. It is possible to efficiently remove air containing volatile scattered substances (volatile substances) such as residual monomers, oligomers, additives, etc. It is possible to greatly reduce the contamination of the exhaust blower and the like, and it is possible to produce a high-quality film-shaped resin molded product. In addition, the purified air containing no volatile substances is discharged into and out of the factory, so that the production can be performed without polluting the atmosphere around the factory and the working environment in the factory.

In addition, since dust collection of volatile substances by the electric dust collector uses Coulomb force by corona discharge, cleaning such as when a filter or a perforated plate is used is unnecessary, and maintenance is excellent. ing. In addition, a heating device (claims 2 to 6) transforms a volatile substance collected by the electric dust collecting device and attached to the electric dust collecting device into a liquid state by heating, so that liquefied collecting is performed. It is easy to collect substances and have gravity higher than the adhesive force to remove them from the electrical dust collector by dropping them.Therefore, stop production for maintenance or disassemble or wear out the main body of the remover. There is no need to replace products and the like, and maintenance is greatly improved.

In particular, by providing a removable collection tank below the electric dust collector (claim 8), it is possible to easily and surely collect the dropped volatile substances. . Further, the heating device (claim 2,
By the temperature control of 3), the volatile scattered matter attached to the trapping substance is surely transformed into a liquid state by continuously or discontinuously heating the trapping substance to a temperature not lower than its melting point and not higher than its boiling point. In particular, by collecting the trapping substance at a temperature higher than the melting point but not excessively heating it (claim 2), it is possible to efficiently and efficiently collect the volatile scattered matter in the liquid state.

Further, the processing gas suction device is provided with a suction chamber device opened near the die outlet (Claim 7).
Adhesion of volatile scattered matter on the film can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the overall configuration of a volatile splatter removal apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of the apparatus for removing volatile splatters according to one embodiment of the present invention in a state where a separation drum main body and a dust collecting electrode are assembled.

FIG. 3 is a configuration principle diagram of a dust collecting electrode of the volatile scattered matter removing device according to one embodiment of the present invention.

FIG. 4 is a diagram illustrating a growth process of mist into droplets in the volatile scattered matter removing device according to one embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of a dust collection experiment using a volatile splatter removal apparatus according to an embodiment of the present invention.

FIG. 6 is a diagram showing a conventional technique (Japanese Patent Laid-Open No. 4-201432).

[Explanation of symbols]

 Reference Signs List 3 base part of resin molding machine (die exit) 4 molten resin 4A plastic film (film-like resin molded product) 5 cooling roll 6 take-off roll 10 power supply device 20 separation barrel main body 21 trunk center part 22 lid 22a canopy part 22b bottom lid part Reference Signs List 23 Process gas inlet 24 Exhaust outlet 25 Outlet 26 Inlet header chamber 26a Header opening 27 Outlet header chamber 27a Header opening 28 Heated gas supply / discharge port 28a Heated gas supply port 28b Heated gas discharge port 29 Partition member 30 Electrical dust collector 31 Process gas duct 32 Electrode 33 Conductor 33a Positive conductor 33b Cathode conductor 34 Heating gas duct 35 Insulator 36 Insulator 37 Electrostatic field 40 Collection tank unit (collected collection tank) 41 Tank 42 Open / close valve 43 Observation window 50 Processing gas heating device 51 Heating device 52 Blower device 53 Duct 60 Physical gas suction device 61 sucking chamber means 62 blower 63a, 63b duct unit (duct) 70 the process gas 80 mist 90 droplet 100 heated gas

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mikitomo Sakakibara 1 Nagoya-shi, Iwazuka-cho, Nagoya-shi Nagoya Equipment Works (72) Inventor Yoshiyuki Kita Yoshiyuki Iwatsuka-cho, Nakamura-ku, Nagoya Road No. 1 Mitsubishi Heavy Industries, Ltd. Nagoya Equipment Works (72) Inventor Noritaka Hasegawa 60-1, Iwatsukacho, Nakamura-ku, Nagoya-shi AM10 AP05 AR06 KA01 KA17 KK90 KL42 KM05 KM20

Claims (8)

[Claims] An apparatus attached to a resin molding machine for producing a film-shaped resin molded product, wherein the processing gas, which is air containing volatile scattered substances generated by the resin molding machine, is sucked and exhausted. A processing gas suction device, a processing gas duct through which the processing gas passes, a pair of electrodes disposed at a gas inflow portion of the processing gas duct, and a DC power supply for applying a voltage between the processing gas duct and the electrode. A volatile splatter removal apparatus for a resin molding machine, comprising: an electric dust collector; and a heating device for heating the processing gas to a predetermined temperature. 2. The heating device according to claim 1, wherein the heating device heats the processing gas based on the target temperature, wherein a target temperature is higher than a melting point temperature and lower than a boiling point temperature of the resin molded product. 2. The volatile scattered matter removing device for a resin molding machine according to 1. 3. The removal of volatile scattered matter for a resin molding machine according to claim 2, wherein the heating device sets the target temperature at a temperature higher by 10 ° C. than a melting point temperature of the resin molded product. apparatus. 4. The heating device according to claim 2, wherein the heating device includes heating gas ducts alternately arranged in a direction orthogonal to the processing gas duct of the electric dust collecting device.
The volatile scattered matter removing device for a resin molding machine according to the above. 5. The volatile splatter removal apparatus for a resin molding machine according to claim 2, wherein the heating apparatus includes an electric heater attached to a wall surface of the processing gas duct. 6. The resin molding machine according to claim 2, wherein the heating device heats the processing gas using waste heat discharged from an oven of the resin molding machine. Volatile splatter removal equipment. 7. The volatile scattering for a resin molding machine according to claim 1, wherein the processing gas suction device includes a suction chamber device opened near a die outlet. Object removal device. 8. The volatilization for a resin molding machine according to claim 1, further comprising a removable collection tank below the electric dust collector. Scattered matter removal device.