JP2002018232A - Odor trapping apparatus, injection molding machine, extruder and apparatus for regeneration treatment of foamed resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an odor trapping apparatus with which a malodor generated from a molten resin material in a molding process for a synthetic resin is effectively eliminated and the surrounding environment can be prevented from being deteriorated, and an injection molding machine, an extruder and an apparatus for regeneration treatment of a foamed resin molded article. SOLUTION: The odor trapping apparatus 100 consisting of a gas-liquid separator into which the gas generated from the molten resin material in the molding process for the synthetic resin is taken and in which the gas is cooled and a liquid ingredient W generated by cooling is separated and removed is provided, and the injection molding machine is provided by connecting the above trapping apparatus to a vent hole for degassing of a heating cylinder through a pipeline for degassing, and also the extruder and the injection molding machine are provided. The apparatus for regeneration treatment of the foamed resin molded article has a vent hole for exhausting a high temperature gas emitted from the foamed resin when volume reduction is treated to a volume reduction means for performing the volume reduction by heating and melting the foamed resin, and the vent hole is connected with the above odor trapping apparatus through the pipeline to exhaust the above high temperature gas into open air through the odor trapping apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an odor trapping device, an injection molding machine, an extruder, and an apparatus for regenerating a foamed resin molded product. The odor collection device that effectively removes the odor in the exhausted gas and prevents the working environment from deteriorating, and also effectively removes the odor emitted from the injection molding machine or extruder, thus deteriorating the working environment The present invention relates to an injection molding machine, an extruder, and a foamed resin molded product reclaiming apparatus for preventing the occurrence of foaming.

[0002]

2. Description of the Related Art It has been known that when a synthetic resin is heated and melted by a melt-kneading apparatus for molding, the surrounding environment is deteriorated by gas generated from the molten resin.

For example, in a so-called vent type injection molding machine or extruder having a vent hole for deaeration in a heating cylinder containing a screw, water or air contained in a resin material melt-plasticized in the heating cylinder is used. The volatile components are degassed and removed to prevent the inclusion of bubbles in the molded product and the occurrence of pinholes. At this time, they are generated from the molten resin and exhausted from the vent of the heating cylinder. The gas contains a malodor component contained in the melt-plasticized resin material, and the gas containing the malodor is released from an injection molding machine or an extruder, thereby significantly deteriorating the surrounding working environment.

[0004] A similar problem is a problem which is also observed in a foamed resin molded article regenerating apparatus in which a foamed resin molded article is heated and melted to reduce the volume and then regenerated.

Conventionally, the gas containing the malodor emitted from the vent port of the molding machine or the regenerating apparatus is treated with activated carbon, or is diluted and released to the atmosphere to suppress the deterioration of the working environment. If the gas containing a bad smell is directly treated with activated carbon, the load on the activated carbon will be too high, so that the activated carbon must be replaced frequently or the activated carbon treatment equipment itself needs to be large-scale, and in terms of workability and cost. Not only is it undesirable, but there is a limit to the deodorizing effect. Further, diluting a gas containing a bad odor does not fundamentally solve the problem that the bad odor component is released from the molten resin to the surroundings.

As a result of intensive studies on this problem, the present inventors have found that the malodor generated from the molten resin material during the molding process of the synthetic resin is caused by the high temperature heat generated during the molding of the monomer component contained in the resin. We believe that gaseous release is the main cause.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to effectively remove a bad smell generated in a resin material melted in a molding process of a synthetic resin and to prevent deterioration of the surrounding environment. An object of the present invention is to provide an odor trapping device.

Another object of the present invention is to provide an injection molding machine capable of effectively removing a bad odor emitted from a vent and preventing deterioration of the surrounding environment.

Another object of the present invention is to provide an extruder capable of effectively removing a bad odor emitted from a vent and preventing deterioration of the surrounding environment.

Still another object of the present invention is to provide an apparatus for regenerating a foamed resin molded product capable of effectively removing bad odors emitted during volume reduction treatment of the foamed resin and preventing deterioration of the surrounding environment. To provide.

[0011]

According to a first aspect of the present invention, there is provided a method of manufacturing a synthetic resin, comprising: taking in a gas generated from a molten resin material in a molding process of a synthetic resin;
An odor collection device comprising a gas-liquid separation device for separating and removing a liquid component generated by the cooling.

According to a second aspect of the present invention, the gas-liquid separation device has an inlet for taking in gas generated from the molten resin material and an outlet for taking out cooled gas, and has a refrigerant inside. A cooling chamber, a cooling pipe connected between the inlet and the outlet and housed in the cooling chamber, and a gas generated from the resin material connected to the outlet and cooled through the cooling pipe. 2. The odor trap according to claim 1, further comprising a separation chamber for separating and removing the liquid component condensed by the removal, and an outlet for discharging a residual gas component separated from the liquid component in the separation chamber. Collector.

According to a third aspect of the present invention, there is provided the odor trapping device according to the first or second aspect, further comprising a treatment section for treating the separated gas component with activated carbon.

According to a fourth aspect of the present invention, there is provided an injection molding machine having a deaeration vent port in a heating cylinder, wherein the vent port is provided with a deaeration pipe. An injection molding machine characterized by connecting an odor trapping device.

According to a fifth aspect of the present invention, there is provided an extruder having a deaeration vent in a heating cylinder, wherein the odor is provided through a deaeration pipe at the vent. An extruder characterized by connecting a collecting device.

According to a sixth aspect of the present invention, there is provided an apparatus for regenerating a foamed resin molded article having a volume reducing means for reducing the volume by heating and melting the foamed resin. Forming an exhaust port for discharging the high-temperature gas released from the exhaust port, and connecting the exhaust port with a pipe through a pipe.
3. An apparatus for regenerating a foamed resin molded product, wherein the odor trapping device according to any one of 3 above is connected, and the high-temperature gas is released to the atmosphere via a deodorizing device.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of the entire configuration of an odor trapping device according to the present invention. Reference numeral 1 denotes a cooling chamber, which is formed in a box shape, and stores therein cooling water C serving as a refrigerant.

The cooling chamber 1 has an inlet 2 for taking in a high-temperature gas generated from a synthetic resin in a molten state in a molding process of the synthetic resin, and an outlet for taking out a gas cooled by the cooling water C. An outlet 3 is formed,
A cooling pipe 4 connected between the inlet 2 and the outlet 3 is immersed in the cooling water C inside the cooling chamber 1.

The cooling water C stored in the cooling chamber 1 is
Circulation may be performed at all times or sequentially by a circulating means (not shown). Further, the refrigerant is not limited to the cooling water C, and a refrigerant gas may be used.

The temperature of the refrigerant in the cooling chamber 1 is appropriately set according to the type of synthetic resin molded by a melt-kneading device to which the present odor trapping device is applied. That is, by setting the refrigerant temperature to a temperature lower than the boiling point of the monomer component contained in the gas generated from the synthetic resin in a molten state, the monomer which is a main cause of the malodor in the gas released from the molten resin The components can be liquefied and separated and removed in a separation chamber described below.

The cooling pipe 4 is bifurcated in the cooling chamber 1 from the intake port 2, and constitutes spiral portions 4a and 4b each of which is spirally wound. Spiral parts 4a, 4b
Are provided in parallel in the cooling water C, and the cooling pipe 4 is unified again through the spiral portions 4a and 4b to form the outlet 3
It is connected to the. Since the cooling pipes 4 are branched in the cooling chamber 1 and each of them is spirally wound in this manner, the gas discharged from the molten resin can be efficiently cooled by the cooling water C.

The cooling pipe 4 is made of a material having good heat conductivity in order to exchange heat with the refrigerant in the cooling chamber 1 more efficiently.
For example, it is preferably formed by a copper tube. In addition,
The number of branches is not limited to the illustrated two at all.

Reference numeral 5 denotes a separation chamber disposed below the cooling chamber 1, and is formed in a box shape like the cooling chamber 1.
A receiving port 6 is provided above the side wall of the separation chamber 5, and the outlet 3 of the cooling chamber 1 is connected to the receiving port 6 of the storage unit 5 via a pipe 7, and the outlet of the cooling chamber 1 is provided. The cooled gas taken out of 3 is received.

The high-temperature gas generated from the molten resin introduced from the inlet 2 of the cooling chamber 1 is cooled by the cooling water C through the cooling pipe 4 in the cooling chamber 1.
A liquid component (monomer component) is condensed and liquefied from the gas. In the separation chamber 5, the liquefied liquid component and the remaining gas component are received from the outlet 3 of the cooling chamber 1 via the pipe 7, and the liquid component is separated and removed by storing the liquid component at the bottom thereof. Therefore, the odor collection device 10 according to the present invention
Reference numeral 0 denotes a gas-liquid separation device that separates and removes a liquid component from a high-temperature gas generated from a molten resin.

The separation chamber 5 may be formed integrally with the lower part of the cooling chamber 1 as shown, or may be formed separately. In the case of the illustrated embodiment in which the separation chamber 5 is formed integrally with the lower part of the cooling chamber 1, the partition wall 11 (the bottom plate of the cooling chamber 1 or the top plate of the separation chamber 5) separating the cooling chamber 1 and the separation chamber 5. This is a preferred mode because the cooling atmosphere in the separation chamber 5 can be made to be a cooling atmosphere by the refrigerant in the cooling chamber 1 via the cooling chamber 1, and the liquefied component stored in the separation chamber 5 can be prevented from being regasified. . At this time, it is more preferable that the partition 11 is formed of a material having a good thermal conductivity such as a copper plate. In the drawing, W is a liquid component stored at the bottom of the separation chamber 5,
G is a residual gas component separated from the liquid component W.

The separation chamber 5 is provided with an outlet 8 for discharging the gas component from which the liquid component W has been separated and removed, which is located above the side wall of the separation chamber 5. Reference numeral 9 denotes a drain port provided at a lower portion of the side wall for discharging the liquid component W stored at the bottom of the separation chamber 5. The liquid component stored in the separation chamber 5 is supplied to the drain port 9. Can be discharged to the outside as waste liquid.

From the viewpoint of further improving the deodorizing effect of the gas component discharged from the discharge port 8 of the separation chamber 5, it is preferable to provide a treatment unit 10 for treating the gas component with activated carbon at the subsequent stage of the discharge port 8. Since the gas component discharged from the outlet 8 of the separation chamber 5 contains almost no liquefied monomer component after being separated and removed, even if the gas component is discharged as it is, it does not give off a bad smell enough to significantly deteriorate the surrounding environment. Absent. Therefore, if the processing unit 10 is provided downstream of the discharge port 8, the load on the activated carbon can be reduced, and the small processing unit 1
A value of 0 allows the effect to be sufficiently exhibited.

Next, the operation of the odor collecting device 100 will be described.

When a high-temperature gas generated from the molten resin material in the molding process of the synthetic resin is taken in from the inlet 2 of the cooling chamber 1, the cooling chamber 1 passes through the cooling pipe 4 connected to the inlet 2. Introduced within. The gas in the cooling pipe 4 introduced into the cooling chamber 1 is supplied to the cooling pipe 4 (the spiral portions 4a, 4a).
b) In the process of flowing through the inside, heat exchange is performed with the cooling water C in the cooling chamber 1 to be cooled.

The monomer component contained in the high-temperature gas introduced through the inlet 2 is condensed and liquefied by being cooled to below its boiling point by the cooling water C. The liquefied component of the monomer and the remaining gas component are taken out of the cooling chamber 1 through the outlet 3 of the cooling chamber 1 and introduced into the separation chamber 5 through the receiving port 6 through the pipe 7, and the liquefied component W Is stored at the bottom of the separation chamber 5, while the remaining gas component G
Is separated from the liquefied component W.

Gas component G from which liquefied component W is separated and removed
Is discharged out of the apparatus through the discharge port 8 of the separation chamber 5. The gas component G discharged to the outside of the apparatus does not emit a bad odor because the monomer component which is a bad odor component is separated and removed and hardly contains the odor component, and does not cause a problem of remarkably deteriorating the surrounding environment.

Further, when a processing section 10 is further provided after the outlet 8 of the separation chamber 5, the deodorizing effect is further enhanced.

The odor trapping device according to the present invention can be widely used for removing malodorous components contained in a high-temperature gas generated from a resin material melted in a synthetic resin molding process. As a material that generates a high-temperature gas during the molding process of the synthetic resin, for example, an injection molding machine for molding a synthetic resin molded product using an injection mold, and a synthetic resin molded product is extruded using an extrusion die. There is an extruder for extruding, an extruder for producing pellets, a synthetic resin regeneration processing machine such as a foamed resin molded product, and the like, and the odor trapping device according to the present invention can be applied to any of these devices. it can. Specifically, a pipe is used to connect a vent port formed for deaeration or an exhaust port formed for exhaust and an inlet 2 of the cooling chamber 1 to the injection molding machine, the extruder, the regenerative processing machine, or the like. Can be used by connecting. The odor trapping device according to the present invention can effectively remove the bad odor of the gas generated from the resin material melted in the process of molding the synthetic resin, and can prevent the surrounding working environment from deteriorating. .

The gas generated when the styrofoam molded product is heated and melted by the regenerator is deodorized by the odor collection device according to the present invention, and the liquid component stored in the separation chamber is taken out at that time. The results of the analysis are shown in Table 1. As shown in the analysis results, it was confirmed that the monomer component was liquefied and separated and removed from the gas generated from the molten resin.

[0036]

[Table 1]

FIG. 2 shows an example in which the odor trapping device 100 is applied to a well-known injection molding machine of a so-called vent type having a venting port for deaeration in a heating cylinder. In the figure, 20
Is an injection molding machine, 21 is a heating cylinder, 22 is a vent port for deaeration formed in the heating cylinder 21, 23 is a hopper containing a resin material to be supplied to the heating cylinder 21,
24 is a drive mechanism for driving a screw (not shown) inserted in the heating cylinder 21, and 25 is a mold.

Reference numeral 26 denotes a degassing pipe, which connects the vent port 22 formed in the heating cylinder 21 of the injection molding machine 20 and the intake port 2 of the cooling chamber 1 of the odor trapping device 100.

In FIG. 2, a vacuum pump 27 is interposed in the degassing pipe 26, and the gas in the molten resin in the heating cylinder 21 is forcibly exhausted from the vent port 22 by the vacuum pump 27. This is not essential in the present invention.

In the injection molding machine 20, high-temperature gas is degassed from the molten resin material in the heating cylinder 21,
Air is exhausted from the vent port 22 of the heating cylinder 21 to the outside by the vacuum pump 27.

The degassed high-temperature gas is supplied to a degassing pipe 26.
The monomer component causing the bad odor is liquefied and separated and removed from the degassed gas by the odor collection device 100 through the odor collection device 100. Therefore, the gas component discharged from the odor trapping device 100 does not emit a bad odor even if it is released to the atmosphere, and does not significantly deteriorate the working environment.

Although not shown, the odor collection device 100
Of the gas component discharged from the injection molding machine 2
The transfer to the zero hopper 23 can further suppress the release of gas components to the surroundings.

FIG. 3 shows an example in which the odor collecting device 100 is applied to a well-known extruder having a deaeration vent in a heating cylinder. In the figure, reference numeral 30 denotes an extruder;
1 is a heating cylinder, 32 is a vent port formed in the heating cylinder 31 for deaeration, 33 is a hopper containing a resin material to be supplied to the heating cylinder 31, and 34 is a heating cylinder 31
A driving mechanism 35 for driving a screw (not shown) inserted in the device is a die.

Reference numeral 36 denotes a degassing pipe, which connects the vent port 32 formed in the heating cylinder 31 of the extruder 30 with the intake port 2 of the cooling chamber 1 of the odor trapping device 100.

In FIG. 3, a vacuum pump 37 is interposed in the deaeration pipe 36, and the gas in the molten resin in the heating cylinder 31 is forcibly exhausted from the vent port 32 by the vacuum pump 37. This is not essential in the present invention.

In the extruder 30, high-temperature gas is degassed from the molten resin material in the heating cylinder 31, and exhausted to the outside by the vacuum pump 37 from the vent port 32 of the heating cylinder 31.

The degassed high-temperature gas is supplied to a degassing pipe 36.
The monomer component causing the bad odor is liquefied and separated and removed from the degassed gas by the odor collection device 100 through the odor collection device 100. Therefore, the gas component discharged from the odor trapping device 100 does not emit a bad odor even if it is released to the atmosphere, and does not significantly deteriorate the working environment.

Although not shown, the odor collector 100
By transferring the gas component discharged from the hopper 33 to the hopper 33 of the extruder 30 via a pipe, the release of the gas component to the surroundings can be further suppressed.

FIGS. 4 and 5 show the odor trapping device 100.
Is applied to a foamed resin molded product regenerating apparatus in which a foamed resin molded product such as styrene foam or polyethylene foam is heated and melted by various volume reducing means to reduce the volume.

FIG. 4 shows an apparatus 40 for regenerating a foamed resin molded article having volume reducing means for melting and reducing the volume of the foamed resin molded article P by frictional heat.

In the drawing, reference numeral 41 denotes a hopper for accommodating the foamed resin molded product P, and a crushing means 42 comprising a rotary blade for crushing the foamed resin molded product P is provided near the bottom thereof.

Reference numeral 43 denotes a volume reducing means which is formed in a box shape. Inside the hopper 41, a pair of rotating disks 44a and 44b for receiving the foamed resin pulverized from the hopper 41 and heating and melting the foamed resin using frictional heat to reduce the volume are provided. They are arranged facing each other. The foamed resin received from the hopper 41 is introduced between the rotating disks 44a and 44b, and is melted by frictional heat generated by the rotation. 45 is a rotating disk 44a,
This is a motor for rotating 44b.

A part of the side wall of the volume reducing means 43 has an exhaust port 4
6 is provided so that when the foamed resin is melted by frictional heat, the gas generated from the melted resin material and filled in the volume reducing means 43 can be discharged to the outside of the apparatus. This exhaust port 46 is connected to the intake 2 of the cooling chamber 1 of the odor trap 100 via a pipe 47. Although not shown, an exhaust unit such as a fan or a pump may be interposed in the pipe 47.

The gas in the volume reducing means 43 taken into the odor collecting device 100 is discharged to the atmosphere through the odor collecting device 100.

By accepting the gas exhausted from the volume reducing means 43 into the odor collecting device 100, the odor collecting device 100 liquefies and separates and removes the monomer component causing the bad odor from the gas. Therefore, the gas component discharged from the odor trapping device 100 does not emit a bad odor even if it is released to the atmosphere, and does not significantly deteriorate the working environment.

FIG. 5 shows an apparatus 50 for regenerating a foamed resin molded product having a volume reducing means for melting and reducing the volume of the foamed resin molded product P by shearing heat generated by a screw.

In the figure, reference numeral 51 denotes a hopper for accommodating the foamed resin molded product P, and a crushing means 52 comprising a rotary blade or the like for crushing the foamed resin molded product P is provided near the bottom thereof.

Reference numeral 53 denotes a volume reducing means, which comprises a heating cylinder. Inside the volume reducing means 53, below the hopper 51, a screw 54 that receives the foamed resin crushed from the hopper 51 and heats and melts the foamed resin using shear heat to reduce the volume is rotated. It is arranged as possible. The foamed resin received from the hopper 51 is melted by shearing heat generated by rotation of the screw 54 and heat of a heater (not shown) provided on the outer periphery of the volume reducing means 53. 55 is a motor for rotating the screw 54.

A part of the side wall of the volume reducing means 53 has an exhaust port 5
In order to obtain a recycled product having a large specific gravity, degassing is performed from the molten resin during the volume reduction process. This exhaust port 56 is connected to the intake 2 of the cooling chamber 1 of the odor trap 100 via a pipe 57. Although not shown, exhaust means such as a fan and a pump may be interposed in the pipe 57.

The odor trapping device 1 which is degassed from the molten resin
The gas taken in at 00 is discharged to the atmosphere through the odor trapping device 100.

The high-temperature gas degassed from the molten resin in the volume reducing means 53 is received by the odor collecting device 100, and the odor collecting device 100 liquefies the monomer component causing the bad odor from the gas. And separated and removed. Therefore, the gas component discharged from the odor collection device 100 is:
It does not give off odors when released to the atmosphere and does not significantly degrade the working environment.

The apparatus to which the odor collecting apparatus 100 according to the present invention is applied includes the injection molding machine 20 and the extruder 3 described above.
The present invention can be widely applied not only to the foaming resin molded product reprocessing devices 40 and 50 but also to a melt kneading device and a regenerating device for performing various moldings by heating and melting a synthetic resin.

[0063]

According to the present invention, there is provided an odor trapping device capable of effectively removing an odor generated from a resin material melted in a molding process of a synthetic resin and preventing deterioration of a surrounding environment. can do.

Further, according to the present invention, it is possible to provide an injection molding machine capable of effectively removing malodor emitted from the vent port and preventing deterioration of the surrounding environment.

Further, according to the present invention, it is possible to provide an extruder capable of effectively removing malodor emitted from the vent port and preventing deterioration of the surrounding environment.

Furthermore, according to the present invention, there is provided an apparatus for regenerating a foamed resin molded product capable of effectively removing a malodor released during volume reduction treatment of the foamed resin and preventing deterioration of the surrounding environment. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of the overall configuration of a deodorizing device of the present invention.

FIG. 2 is a configuration diagram showing an example of an injection molding machine.

FIG. 3 is a configuration diagram showing an example of an extruder.

FIG. 4 is a configuration diagram showing an example of a reproduction processing apparatus for a foamed resin molded product.

FIG. 5 is a configuration diagram showing another example of a foaming resin molded product reprocessing apparatus.

[Explanation of symbols]

 1: Cooling chamber 2: Inlet 3: Outlet 4: Cooling pipe 4a, 4b: Spiral section 5: Separation chamber 6: Receiving port 7: Pipe 8: Outlet 9: Drain port 10: Processing section 20: Injection molding machine 30: Extruder 40: Regeneration processing device for foamed resin molded product 50: Regeneration processing device for foamed resin molded product 100: Odor trapping device C: Cooling water G: Gas component W: Liquefied component

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B29C 47/76 F term (Reference) 4D002 AA21 AA40 AB02 AB03 AC07 BA04 BA13 DA41 4F206 AM26 JA07 JL02 JM01 JP30 JQ03 JQ05 4F207 AM26 KA01 KL41 KL43 KM20 4F301 AA13 AA15 BA10 BA21 BB04 BB05 BD29 BE01 BE18 BE39 BF16 BF17

Claims (6)

[Claims] 1. A gas-liquid separation device for cooling by taking in a gas generated from a resin material melted in a molding process of a synthetic resin, and separating and removing a liquid component generated by the cooling. Odor collecting device. 2. A cooling chamber having an inlet for taking in gas generated from a molten resin material and an outlet for taking out gas after cooling, and a cooling chamber having a refrigerant therein, A cooling pipe connected across the inlet and the outlet and housed in the cooling chamber; and a gas generated from the resin material connected to the outlet and cooled through the cooling pipe. 2. The odor trapping device according to claim 1, further comprising a separation chamber for separating and removing the condensed liquid component, and an outlet for discharging a residual gas component separated from the liquid component in the separation chamber. 3. The odor trapping device according to claim 1, further comprising a treatment section for treating the separated gas component with activated carbon. 4. An injection molding machine having a degassing vent port in a heating cylinder, wherein the odor trapping device according to claim 1 is connected to the vent port via a degassing pipe. An injection molding machine characterized by being made. 5. An extruder having a deaeration vent port in a heating cylinder, wherein said vent port is connected to a deaeration pipe via a deaeration pipe.
An extruder comprising the odor collection device according to claim 1 connected thereto. 6. A foamed resin molded article regenerating apparatus having a volume reducing means for reducing the volume by heating and melting the foamed resin, wherein the high volume gas discharged from the foamed resin during the volume reducing process is supplied to the volume reducing means. And an odor trapping device according to any one of claims 1 to 3 connected to the exhaust port via a pipe, and the high-temperature gas is discharged to the atmosphere via a deodorizing device. A recycling processing apparatus for a foamed resin molded product, characterized in that: