JP3681172B2 - Extrusion method and apparatus for resin composition - Google Patents

Description

【００２１】
【発明の効果】
本発明による樹脂組成物の押出方法及び装置は、以上のように構成されているため、次のような効果を得ることができる。
すなわち、樹脂組成物の製造工程において、押出機や混練機、重合缶などの吐出部に使用される口金において口金吐出孔にあらかじめ加熱した気体を吐出部全面に吹き付けられる構造にすることで、目やに状態になる前に、溶融樹脂に連続的に異物を付着させることで更新しながら、更に、目やにを口金吐出孔から吹き飛ばし、口金吐出孔近傍への目やにの付着・堆積が防止できることで、目やにの製品への混入が無く、目やに混入による製品の商品価値低下を防ぐことができるという効果が得られる。
又、気体の風量を１つの口金吐出孔当たり、３〜５０Ｌ．Ｎｏｒｍａｌ／ｍｉｎ、風速を口金吐出孔に対して３〜１００ｍ／ｓ、気体温度を、２０℃〜４２０℃にすることで、口金吐出孔の目詰まりやストランド切れを引き起こすことなく、目やにの製品への混入も防止できる。但し、気体温度を上げるほど、作業性が悪くなる為、特に好ましくは２０℃（常温）〜２００℃の温度範囲、気体の風量は、１つの口金吐出孔当たり、３〜３０Ｌ．Ｎｏｒｍａｌ／ｍｉｎ、風速は口金吐出孔に対して、３〜３０ｍ／ｓの範囲にすると作業性も良く、目やにの製品への混入が防止でき、目やにの混入による、製品の商品価値低下を防ぐことができる。
【図面の簡単な説明】
【図１】 本発明による樹脂組成物の押出装置を示す断面構成図である。
【図２】 図１の要部の拡大断面図である。
【図３】 本発明の押出装置における、口金吐出孔（１個）周辺に設けられる気体吹出口の形状を、模式的に表した図である。
【図４】 本発明の押出装置における、口金吐出孔（１個）周辺に設けられる気体吹出口の形状を、模式的に表した図である。
【図５】 本発明の押出装置における、口金吐出孔（１個）周辺に設けられる気体吹出口の形状を、模式的に表した図である。
【図６】 本発明の押出装置における、口金吐出孔（１個）周辺に設けられる気体吹出口の形状を、模式的に表した図である。
【符号の説明】
１ シリンダ
２Ａ 気体加熱用媒体
２、２ａ ヒータ
３ 中心内孔
４ スクリュ
５ ダイホルダ
７ 口金吐出孔
８ 口金
９ 樹脂流路
１０ カバー体
１１ 気体吹出口
１２ 最終気体室
１３ 気体通路絞り
１４ 気体室
１５ 弁
１６ 気体通路
１８ 気体通路遮断弁
１９ 圧縮気体貯蔵室
２０ 逆止弁
２１ 保持枠体
２２ 安全弁
２３ 逆止弁
２４ 高圧圧縮気体製造器
２５ 間欠高圧気体
１００ 押出装置（樹脂組成物製造装置）
１０１ 樹脂組成物[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin composition extrusion method and apparatus, and in particular, in a resin-based material manufacturing process, in a manufacturing process of a molten resin and a resin composition containing various fillers and additives, an extruder and a kneading machine. Foreign materials (before deterioration or discoloration due to heat or oxidation, and the state called the eye) are immediately transferred to the molten resin from the nozzle discharge hole used in the discharge unit of a spinning machine such as a spinning machine, monofila, or superposition can. Or, it relates to a novel improvement for intermittently removing and blowing off.
[0002]
[Prior art]
Generally, in order to produce a resin material for pelletization, a polymer is polymerized from monomers in a polymerization can, or a polymer and various fillers / additives are blended and kneaded in an extruder or a kneader. A method of extruding, cutting, and pelletizing a molten resin composition from a die having discharge holes of a predetermined size is used.
The base used in such a method is made of metal and ceramics, or a combination of the above (metal base body with ceramic chip-like nozzle built-in type), and each discharge hole surface. A base that has been subjected to processing such as plating, and ceramics are used for processing the surface of the discharge hole having one or a plurality of discharge holes, and there are surface coatings such as plating. And JP-A-5-077305, JP-A-6-335950, JP-A-7-186237, JP-A-7-186239, and JP-A-7-256728. As chrome plating, JP-A-5-024097 and JP-A-7-314526, and as other plating, JP-A-63-237923, JP-A-9-099468, JP-A-9-187856. Japanese Laid-Open Patent Publication No. 56-095637, Japanese Laid-Open Patent Publication No. 58-012743, and Japanese Laid-Open Patent Publication No. 5-220812 have been proposed as the fluorine-based coating.
[0003]
[Problems to be solved by the invention]
Since the conventional manufacturing process of the resin-based material is configured as described above, the following problems exist.
That is, when the die used in the molten resin-based material discharge portion of the extruder, kneader, spinning device, polymerization can, etc. is continuously discharging the resin-based material, the vicinity of the die discharge hole outlet Foreign matter adheres to the surface, and over time, it deteriorates and discolors due to heat and oxidation.
The deteriorated and discolored foreign matter (hereinafter referred to as “eyes”) is a sublimate of residual monomers and oligomers contained in the resin, a volatile condensate of various additives, strength Or a filler such as glass fiber used for the purpose of improving dimensional accuracy, or the resin itself or a mixture thereof (resin composition).
In addition, these also repeatedly adhere to the base discharge holes little by little, and the molten resin surface that accumulates in a deteriorated and discolored state over time due to heat and oxidation applied to the base and sometimes discharges. The eyes (deteriorated and discolored foreign matter) adhere to the eyes and the appearance of the product is impaired. Further, the eyes and the lump further grown in the vicinity of the die discharge hole during continuous operation eventually fall off the die and adhere to the continuously discharged resin composition.
When the resin-based material with such eyes and eyes adhered is pelletized as it is and commercialized, when it is made into a molded product by a method such as injection molding, the discolored eyes and eyes appear on the surface of the molded product, There have been problems such as loss of product quality, including the appearance of the product, resulting in a significant reduction in product value. Conventionally, such prevention of mixing into the product in the eye has taken methods such as periodic cleaning of the base discharge surface, scraping off the strand before pelletizing, sorting and removing the eye mixed in the product, The work is extremely difficult, and it cannot be said that the removal rate is low or the time required for sorting is enormous. Thus, the resin material manufacturer has been eager to solve the problem.
[0004]
The present invention has been made to solve the above-described problems, and in particular, in the process of manufacturing a resin composition containing a molten resin and various fillers and additives in the process of manufacturing a resin material, Immediately or intermittently removes the foreign matter generated near the nozzle discharge holes used in the discharge parts of extruders, kneaders, spinning devices, polymerization cans, etc., and adheres to the molten resin continuously or intermittently with gas And it aims at providing the extrusion method of the resin composition made to blow away.
[0005]
[Means for Solving the Problems]
The method for extruding a resin composition according to the present invention is a method for extruding a molten resin from a die discharge hole of a die provided in a die holder at a tip of a cylinder of an extrusion apparatus, wherein the molten resin is In the extrusion method of the resin composition for discharging gas to the gas outlet located on the outer periphery of the die discharge hole via the gas passage passing through the inside of the cover body of the die holder when discharging from the die discharge hole , Rutotomoni provided compressed gas storage chamber always a gas flow supply unit having a check valve on the side, has a gas passage shutoff valve provided between said compressed gas storage chamber and the gas outlet, the non-return The compressed gas from the compressed gas storage chamber is intermittently opened and closed by opening and closing the gas passage shut-off valve in a state where the gas from the constant gas flow supply unit is supplied to the gas outlet through a valve. In this method, the resin composition extrusion apparatus according to the present invention joins with the gas as a deficient high-pressure gas and is exhausted to the gas outlet, and the die of the die provided at the die holder at the tip of the cylinder of the extrusion apparatus In a resin composition extrusion apparatus configured to extrude a molten resin from a discharge hole, when the molten resin is discharged from the base discharge hole, an outer periphery of the base discharge hole via a gas passage passing through the inside of the cover body of the die holder with the extrusion apparatus of the resin composition for discharging the gas to the gas outlet port located, provided a compressed gas storage chamber always a gas flow supply unit that having a check valve on the upstream side of the gas passage, the compressed gas In the state which has the gas passage cutoff valve provided between the storage room and the gas outlet, and supplies the gas from the regular gas flow supply part to the gas outlet via the check valve , Compressed gas from the compressed gas storage chamber by opening and closing the serial gas passage shutoff valve is a structure in which to be merges with the gas as intermittent intermittent high pressure gas discharge to the gas outlet.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a method and an apparatus for extruding a resin composition according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional configuration diagram illustrating the entire extrusion apparatus 100 (that is, a resin composition manufacturing apparatus having a cylinder 1 but includes a kneader, a polymerization can, and the like), and FIG. 2 illustrates a main part of FIG. FIG. 3, FIG. 4, FIG. 5 and FIG. 6 are schematic views of the shape of the gas outlet.
1 is a cylinder of the extrusion apparatus 100. A heater (heating medium) 2 is disposed around the outer periphery of the cylinder 1, and a heater (heating medium) 2a is disposed around the outer periphery of the die holder 5. In addition, a screw 4 is provided in the center inner hole 3 formed in the axial center of the cylinder 1 so as to be rotatable and movable forward and backward.
[0007]
A die 8 having a die discharge hole 7 (one or a plurality of cases) is provided at the tip of the die holder 5 provided at the tip of the cylinder 1. The central inner hole 3 communicates with a resin flow path 9 formed in the die holder 5.
A cover body 10 is attached around the base discharge hole 7 of the base 8. Between the cover body 10 and the outer periphery of the base discharge hole 7, the ring body is located on the outer periphery of the base discharge hole 7. A gas outlet 11 having a slit shape is formed.
[0008]
A gas chamber 14 for guiding gas is provided at the outer peripheral position of the heater (heating medium) 2 a on the outer periphery of the die holder 5, and this gas chamber 14 is connected to the outer periphery of the base discharge hole 7 via a valve 15. A gas passage 16 communicates with the final gas chamber 12 formed between the surface and the inner peripheral surface of the cover body 10, and further communicates with the gas outlet 11.
[0009]
In the final gas chamber 12, for example, a gas passage restriction 13 made of a ring plate or the like is disposed, and the gas passage restriction 13 can restrict the flow rate of the gas passing through the final gas chamber 12. It is configured to be able to. Therefore, the shape of the gas passage restrictor 13 is selected according to the flow rate.
[0010]
The gas in the gas chamber 14 is configured to be heated by the heater (heating medium) 2a, and a check valve is provided on the upstream side of the gas chamber 14 so that the gas is always supplied only in the inflow direction. A compressed gas storage chamber 19 is provided through a gas passage 16 provided with a constant gas flow supply unit 20 </ b> A having 20 and a gas passage shut-off valve 18. Although the valve 15, the gas passage 16, the gas chamber 14 and the compressed gas storage chamber 19 are provided outside the die holder 5, they may be provided inside the die holder 5. Moreover, the gas and compressed gas in the gas chamber 14 and the compressed gas storage chamber 19 can be heated not only by the heaters 2a and 2 but also by a gas heating medium 2A such as liquid or gas.
The compressed gas storage chamber 19 is held at a position outside the heater 2 positioned on the outer periphery of the cylinder 1 via a holding frame 21 so that the compressed gas in the compressed gas storage chamber 19 is heated by the heater 2. It is configured.
The compressed gas storage chamber 19 is connected via a safety valve 22 and a check valve 23 to a high-pressure compressed gas producer 24 as a booster.
[0011]
Accordingly, when the gas passage shut-off valve 18 is closed and the gas is supplied to the gas chamber 14 via the check valve 20, the gas is heated by the heater 2a and continuously discharged from the gas outlet 11 through the valve 15. Is done. Note that by opening and closing the gas passage shutoff valve 18 in this state, is exhausted from the gas outlet port 11 with the larger exhaust pressure compressed gas merges with intermittently the gas as an intermittent high pressure gas 25 It is configured as follows. In addition, it can also be made to discharge | emit from the gas blower outlet 11 using only the intermittent high-pressure gas 25 which consists of the said compressed gas, without using the gas of the continuous supply via the said check valve 20. FIG.
[0012]
The taper angle (inflow angle) of the opening of the cover body 10 is preferably formed to be approximately 60 ° to 120 ° symmetrically about the cylinder axis, and the outer end surface of the opening of the gas outlet 11 The outer end surface of the base discharge hole 7 is preferably set at a position where the outer end surface of the gas outlet 11 is retracted 0.1 to 3 mm with respect to the flow direction of the resin composition 101. It is preferable that the final blowout gap 11 is set to have a width in the direction perpendicular to the flow direction of the resin composition 101 of 0.1 to 1.0 mm. The final discharge angle of the gas outlet 11 is set to 0 ° (parallel) to 30 °.
Therefore, the extrusion method and apparatus of the resin composition in the present invention is such that when the resin composition 101 made of molten resin is discharged from the die discharge hole 7, the gas discharge hole 7 passes through the gas passage 16 passing through the die holder 5. Gas is discharged to the gas outlet 11 processed on the outer periphery, and the gas heated to 20 ° C. (normal temperature) to 420 ° C. in the base discharge hole 7 is 3 to 50 L. The gas is blown with an air volume of Normal / min and a wind speed of 3 to 100 m / s.
Further, in some cases, the compressed compressed gas can be blown intermittently at high pressure to join together, thereby blowing the eyes of the molten resin generated in the die discharge hole 7.
In addition, the above-mentioned “resin composition 101” in the present invention is a resin (single resin) used for molding such as injection molding or extrusion molding, a resin and other resin composition (resin alloy), these single resins or It is a generic term that includes a composition in which a reinforced resin, a filler, an additive and the like are added to a resin alloy.
The above-mentioned “extrusion apparatus 100” is a general term for a resin composition production apparatus including a kneading / extrusion apparatus having a single screw, a biaxial or more multi-screw extrusion screw, a polymerization can, and the like. Further, the “base 8” is used in a discharge portion when the resin composition 101 is melted and discharged, and the base and fiber for discharging a strand for pelletizing the resin composition 101. Is a generic term that includes a spinneret that discharges a film, a base that discharges a film, a base that forms an electric wire coating layer, a base that is deformed and extruded such as a pipe.
[0013]
In the present invention, the “heated gas” refers to the gas chamber 14 and the compressed gas storage chamber 19 (cylinder-shaped pressure vessel) provided inside or outside the die holder 5 and is heated to 20 ° C. by a heating medium such as an electric heater as necessary. It refers to a gas heated in the range of (normal temperature) to 420 ° C, more preferably 20 ° C (normal temperature) to 350 ° C, and still more preferably 20 ° C (normal temperature) to 200 ° C. For example, the temperature range near 300 ° C. is close to the temperature of the base 8 at the time of manufacturing the resin composition 101, and the base 8 is not easily clogged. However, if the temperature of the discharged gas is too high, the operator may be burned. There is no particular problem even at temperatures as low as 20 ° C. (normal temperature) to 200 ° C. in consideration of the work environment and workability. Examples of the gas include air, nitrogen gas, and steam, but are not particularly limited. However, air is most preferable in view of cost in order to exert the effects of the present invention.
[0014]
Moreover, it is preferable that the gas blower outlet 11 has such a shape that the gas is evenly blown to the die discharge hole 7 of the die 8. The shape of the gas outlet 11 is not particularly limited as long as the gas can be uniformly blown to the base discharge hole 7. As shown in FIGS. Examples include a continuous pinhole shape. In addition, the outer diameter, slit width, gas discharge angle, etc. in the case of a circular shape are not particularly limited as long as it hits the discharged resin composition 101, but in the case of a circular shape, preferably the nozzle discharge hole 7 and the gas outlet 11 The final blowout clearance is 0.1 to 1.0 mm (single clearance), and the inflow angle at which the gas is guided is 60 ° to 120 ° (full angle), which is almost symmetrical about the cylinder axis. It is preferable that gas is further guided to the gas outlet 11 having a final discharge angle of 0 ° (parallel) to 30 ° (half angle) and blown to the die discharge hole 7. In addition, the gas blowing is performed in the gas outlet 11 (the outer end face of the opening of the gas outlet 11 is the resin composition 101) at a position 0.1 to 3 mm retracted from the tip of the base outlet hole 7 (the outer end face of the base outlet hole 7). The gas should be blown from the position of 0.1 to 3 mm with respect to the flow direction. Further, in the present invention, the amount of air blown in the gas is generated near the outlet of the nozzle discharge hole 7, and among the eyes that adhere to and deposit on the nozzle discharge hole 7, those that contain a large amount of sublimates and those that have a large amount of volatile matter 3 to 50 L. per one nozzle discharge hole 7 (may be plural). It is preferable to spray a gas of Normal / min. If the air volume is smaller than this, the eyes and the eyes due to the sublimated matter are likely to accumulate in the vicinity of the mouthpiece discharge hole 7 as time passes. If the air volume is larger than this, the operational problem such as strand breakage is likely to occur.
[0015]
As the wind speed, it is usually preferable to blow a gas having a wind speed of 3 to 100 m / s against the nozzle discharge hole 7. If the wind speed is smaller than this, it is difficult to blow off the eyes and if the wind speed is high, problems such as strand breakage are likely to occur.
Here, there is no particular limitation on the spraying time and the resting time at the time of gas spraying as long as the eyes are deposited and peeled off and are not mixed into the product. Furthermore, since the gas is instantaneously blown onto the base 8 by supplying the gas intermittently, the eyes and the eye easily blow off. Although the blow to the eyes of the continuous supply of gas is not as high as the intermittent supply, the foreign matter does not completely adhere to the surface of the nozzle discharge hole 7 due to the gas blowing, and adheres continuously to the molten resin before it becomes a close to the eyes. Since it is constantly updated, discoloration due to heat deterioration and oxidation deterioration of the foreign matter is surprisingly suppressed, and an effect of preventing the occurrence of the eye is recognized.
The amount of air blown is 3 to 50 L. per nozzle discharge hole 7. The range of Normal / min is preferable, and more preferably 3 to 30 L. Normal / min, wind speed is preferably in the range of 3 to 100 m / s, more preferably in the range of 3 to 30 m / s. It is preferable to blow gas intermittently and blow off the eyes.
[0016]
Next, the operation will be described. First, in the production process of the resin composition 101, an eye is generated near the outlet of the die discharge hole 7 of the die 8 used in the discharge part of the resin composition production apparatus 100 such as an extruder, a kneader, or a polymerization can, Adhere and deposit. In this eye, a sublimate, a volatile condensate in the discharged resin composition 101, a filler such as glass fiber, a resin itself, or the like adheres to the vicinity of the nozzle discharge hole 7 and heat deterioration occurs on the discharge surface. It is deposited by discoloration due to oxidative degradation, or the surface of the resin composition 101 is scraped off to adhere and deposit.
Therefore, the atmosphere of the nozzle discharge holes 7 containing a large amount of sublimates, volatile components, fillers, and the like is 3 to 50 L. per nozzle discharge hole 7. It is constantly renewed by blowing a gas with an air volume in the range of Normal / min continuously or intermittently or a combination thereof, and it is possible to prevent the occurrence of adhesion / deposition of sublimates and volatile condensate to the nozzle discharge hole 7. Conceivable.
[0017]
Further, as in the case of glass fiber reinforced grade, the gas passage block located near the outlet of the compressed gas storage chamber 19 provided inside or outside the die holder 5 is formed in the eyes or the like generated by scraping the surface of the die discharge hole 7. By opening the valve 18 at an appropriate interval, the gas sufficiently compressed in the compressed gas storage chamber 19 is guided to the gas outlet 11 processed on the outer periphery of the nozzle discharge hole 7 via the gas passage 16, Can be intermittently sprayed onto the die discharge hole 7 at a wind speed in the range of 20 to 30 m / s. Therefore, it can be blown off from the surface of the die discharge hole 7 with the instantaneous force, and mixing into the product in the eyes can be prevented.
Furthermore, as the gas used here, a gas having a temperature of 20 ° C. (normal temperature) to 420 ° C., more preferably 20 ° C. (normal temperature) to 350 ° C., and particularly preferably 20 ° C. (normal temperature) to 200 ° C. is used. As a result, the above effects can be sufficiently exhibited, and operation problems such as clogging of the nozzle discharge holes 7 and strand breakage due to cooling of the nozzle discharge holes 7 can be prevented.
[0018]
Depending on the required gas temperature, a gas heating medium 2A such as an electric heater is also used as the gas, but the inside of the die holder 5 heated to high temperature using the heating medium 2 or 2a of the resin composition manufacturing apparatus 100 or Since it passes through the gas chamber 14 and the compressed gas storage chamber 19 provided outside, a medium for heating the gas in advance may not be required, which is advantageous in terms of equipment and cost.
Accordingly, the high-pressure gas supplied from the outside is continuously heated by the die holder 5, the heater 2a and, if necessary, the highly efficient gas heating medium 2A while passing through the gas chamber 14 and the gas passage 16. After the throttle adjustment by the valve 15, the gas enters the final gas chamber 12, undergoes the throttle adjustment again at the gas passage throttle 13 at this part, and becomes the required uniform air volume and pressure, so that the nozzle discharge hole 7 By continuously blowing the gas from the slit-shaped gas blowout port 11 processed on the outer periphery as a gas having a high temperature, a predetermined air volume, and a wind speed, the effect of preventing the eyes as described above can be exhibited. Furthermore, in order to enhance the effect of preventing the eyes and make sure, the gas supplied via the high-pressure compressed gas production device (gas pressure increasing device) 24 is temporarily stored in the compressed gas storage chamber 19 while heating with a heater. By opening and closing the gas passage shut-off valve 18 at a proper interval, a larger amount of high-pressure gas can be intermittently blown out through the gas passage 16 similar to the above, and the eyes can be blown off more effectively.
[0019]
Examples 1-5
In a twin-screw extruder, nylon 6:70 parts by weight and glass fiber (E glass chopped strand): 30 parts by weight were melt-kneaded and extruded to form strands, which were cut and pelletized. A gas blowing nozzle having a fine hole provided with a gas outlet having a ring-like slit shape with a discharge hole diameter of 4.5 mm and a discharge hole number of 55 as a base of the discharge part so that gas can be blown to each discharge hole. Arranged. Air was used as the gas, and a commercially available hot air generator was used as the heater.
In the eyes, the contamination of the product was measured by weight.
The results are as shown in Table 1 of Table 1 below.
[0020]
[Table 1]

[0021]
【The invention's effect】
Since the method and apparatus for extruding the resin composition according to the present invention are configured as described above, the following effects can be obtained.
That is, in the manufacturing process of the resin composition, in the base used in the discharge part of an extruder, a kneader, a polymerization can, etc., a structure in which a gas heated in advance to the base discharge hole is blown over the entire discharge part, Before it becomes a state, it is renewed by continuously adhering foreign matter to the molten resin, and further, the eye and the eye can be blown off from the mouth discharge hole to prevent adhesion and accumulation on the eye near the mouth discharge hole. There is no mixing in the product, and the effect of preventing a reduction in the product value of the product due to mixing in the eyes can be obtained.
Further, the gas flow rate is 3 to 50 L. per nozzle discharge hole. Normal / min, 3 to 100 m / s of wind speed with respect to the nozzle discharge hole, and gas temperature of 20 ° C. to 420 ° C., so that the nozzle discharge hole is not clogged and strand breakage is achieved. Can also be prevented. However, since the workability deteriorates as the gas temperature is raised, the temperature range of 20 ° C. (normal temperature) to 200 ° C. is particularly preferable, and the gas flow rate is 3 to 30 L. per nozzle discharge hole. Normal / min, wind speed in the range of 3 to 30 m / s with respect to the nozzle discharge hole, workability is good, and it is possible to prevent the product from entering the eye and prevent the product value of the product from being reduced due to the eye. Can do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional configuration diagram showing an apparatus for extruding a resin composition according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of FIG.
FIG. 3 is a diagram schematically showing the shape of a gas outlet provided around a die discharge hole (one piece) in the extrusion apparatus of the present invention.
FIG. 4 is a diagram schematically showing the shape of a gas outlet provided around the mouthpiece discharge hole (one piece) in the extrusion apparatus of the present invention.
FIG. 5 is a diagram schematically showing the shape of a gas outlet provided around a die discharge hole (one piece) in the extrusion apparatus of the present invention.
FIG. 6 is a diagram schematically showing the shape of a gas outlet provided around the die discharge hole (one piece) in the extrusion apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylinder 2A Gas heating medium 2, 2a Heater 3 Center inner hole 4 Screw 5 Die holder 7 Base discharge hole 8 Base 9 Resin flow path 10 Cover body 11 Gas outlet 12 Final gas chamber 13 Gas passage throttle 14 Gas chamber 15 Valve 16 Gas passage 18 Gas passage shut-off valve 19 Compressed gas storage chamber 20 Check valve 21 Holding frame 22 Safety valve 23 Check valve 24 High pressure compressed gas production device 25 Intermittent high pressure gas 100 Extrusion device (resin composition production device)
101 Resin composition

Claims (2)

In the extrusion method of the resin composition, the molten resin is extruded from the die discharge hole (7) of the die (8) provided in the die holder (5) at the tip of the cylinder (1) of the extrusion device (100). When the molten resin is discharged from the die discharge hole (7) , the gas blower located on the outer periphery of the die discharge hole (7) through the gas passage (16) passing through the inside of the cover body (10) of the die holder (5). In the extrusion method of the resin composition for discharging gas to the outlet (11) ,
The constant gas flow supply unit and (20A) compressed gas storage chamber (19) is provided Rutotomoni, the compressed gas storage chamber (19) gas having a check valve (20) upstream of the gas passage (16) A gas passage shutoff valve (18) provided between the air outlet (11) and the gas from the constant gas flow supply section (20A) through the check valve (20) In the state of being supplied to (11) , by opening and closing the gas passage shut-off valve (18) , the compressed gas from the compressed gas storage chamber (19) intermittently becomes the high-pressure gas (25) as the gas and A method for extruding a resin composition, characterized by joining and exhausting to the gas outlet (11) . Extrusion equipment (100) Cylinder (1) Die holder at the tip of (Five) The base provided in (8) Nozzle discharge hole (7) In the extrusion apparatus for a resin composition in which the molten resin is extruded from the molten resin, the molten resin is discharged from the die discharge hole. (7) When discharging from the die holder (Five) Cover body (Ten) Gas passage through the interior (16) Through the nozzle discharge hole (7) Gas outlet located on the outer periphery (11) In the resin composition extrusion apparatus for discharging gas to
The gas passage (16) Check valve upstream of (20) Continuous gas flow supply unit with (20A) And compressed gas storage chamber (19) And the compressed gas storage chamber (19) And the gas outlet (11) Gas passage shut-off valve provided between (18) The check valve (20) Through the continuous gas flow supply unit (20A) Gas from the gas outlet (11) In the state of supplying to the gas passage shut-off valve (18) The compressed gas storage chamber by opening and closing (19) Compressed gas from intermittently intermittent high pressure gas (twenty five) As the gas outlet (11) An apparatus for extruding a resin composition, wherein the apparatus is configured to be exhausted.

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