KR101604362B1 - Apparatus for Expandalble polystyrene beads with improving functionality - Google Patents

Abstract

The present invention relates to an apparatus for producing expandable polystyrene with improved functionality. The apparatus comprises: a first hopper where an expandable polystyrene material (EPS) is input; a first transport device which transports the EPS material; a first storage tank which stores the EPS material; a high-frequency surface treatment device which treats the EPS material by high frequency; a second hopper where the EPS material is input; a SCALE hopper which basis-weights the EPS material by the predetermined weight; a second transport device which transports the EPS material; a second storage tank which stores the EPS material; a mixer; a transfer drying device which transports the EPS material; a two-step sorter which sorts out the EPS material; a third transport device which transports the EPS material; a third storage tank which stores the EPS material; and a packing device which packs the EPS material. According to the producing apparatus of the present invention, the expandable polystyrene having improved water resistance, heat insulating properties, flame resistance, and sound insulation can be produced.

Description

[0001] The present invention relates to an expandable polystyrene beads,

The present invention relates to an apparatus for producing expanded polystyrene having improved functionality and a method of coating foamed polystyrene particles by a series of processes to provide foamed polystyrene having improved water resistance, heat resistance, flame retardancy, and soundproofness to various industrial fields, Panel and the like, and to an apparatus for manufacturing a foamed polystyrene particle coating.

Polystyrene is expanded by the action of foaming agent. It is called foaming polystyrene, styrofoam, foamed styrene, styrofoam. It is abbreviated as EPS raw material after initials in English. It is white and light, and it is widely used because it is excellent in water resistance, heat insulation, soundproofing, and buffering properties.

The polystyrene is a widely used plastic, and is a polymer of styrene. It is a colorless and transparent thermoplastic material. It softens above 100 ℃, becomes a viscous liquid when it reaches about 185 ℃, and has strong properties such as acid, alkali, oil, alcohol and so on. Expanded polystyrene is a foamed product that is injected with hydrocarbon gas such as pentane or butane into the polystyrene resin. It is a resource-saving material with 98% of its volume being air and the remaining 2% being resin.

In the manufacturing process, styrene is injected with a foaming agent such as pentane / butane gas, polymerized with water, and then heated until a predetermined molecular weight is reached. Then, beads, which are spherical raw materials of the obtained expanded polystyrene, are washed and dried, treated with wastewater, and screened to obtain finished products.

Because it is white and light, and is excellent in water resistance, heat insulation, soundproofing and buffering property, it is mainly used for transportation of cups, bowls, plates, shell containers, meat packing containers, egg packing containers, electronic products and other fragile articles It is widely used for packaging materials, wood-framed building materials, decorative furniture, and agricultural and marine products boxes. In addition, it is used as wall material of food warehouse, warehouse of freezing pipe, wall and ceiling material of prefabricated house, stage apparatus of TV and artificial snow.

In addition, expanded polystyrene does not use freon gas, which is the main cause of ozone depletion, but it is an insulation packaging material, which reduces gas emission which causes global warming, greenhouse effect and acid rain. It can be recycled as synthetic wood or lightweight concrete. It does not pollute the groundwater because it does not generate methane gas even if it is buried in the ground.

Such expanded polystyrene is widely used in various industries because it has excellent water resistance, heat insulation, flame retardancy, soundproofness and buffering properties.

Patent No. 10-0927667, "expandable polystyrene particles having improved heat insulation and flame retardancy, and a process for producing the same"

The object of the present invention is to provide a process for producing a foamed polystyrene by subjecting a foamable polystyrene raw material to a high frequency surface treatment and then conveying a binder and additives including an adhesive, graphite and a flame retardant to a two- The coated raw materials are selected by the above-described two-stage sorting machine, and then transported to a silo (SILO) by an air transfer device, and then packed in a packing machine. The coating material is coated as described above to produce a foamed product having improved water resistance, heat insulation, flame retardancy, And to provide polystyrene to various industries.

Particularly, a mixer in which a screw type blade and a mixing member are fixed between the screw type blades is provided on the outer circumferential surface of the rotating shaft of the low speed rotation type, which is a batch type, and the rotating shaft is rotated by driving of the driving motor to rotate the EPS raw material, the binder and the additive It is possible to uniformly mix EPS raw materials, binders and additives in a short time, as well as to mix them up, down, left, and right, and to provide a special mixer that is easy to dry and also easy to clean .

In order to achieve the above object,

A first transfer device for transferring the EPS raw material to the first hopper, a first storage tank for storing the EPS raw material transferred to the first transfer device, A high frequency surface treatment device for subjecting the EPS raw material stored in the first storage tank to a high frequency treatment, a second hopper into which the EPS raw material processed by the high frequency surface treatment device is fed, and an EPS raw material fed into the second hopper, A second conveying device for conveying the EPS raw material fed into the SCALE hopper, a second storage tank for storing the EPS raw material moved to the second conveying device, a second storage tank for storing the EPS raw material stored in the second storage tank, A binder containing an adhesive, graphite, and a flame retardant is added in a predetermined amount and stirred through an EPS raw material and a binder blend feeder, and after 1-2 minutes, various additives are further added through an additive feeder A mixer for mixing up, down, left, and right, a conveying and drying device for conveying the EPS raw material coated in the mixer, and an EPS raw material coated on the conveying and drying device, the dust, A third transfer device for transferring the coated EPS selected through the two-stage sorter, a third storage tank for storing the coated EPS transferred by the third transfer device, And a packaging machine for packaging the coated EPS stored in the third storage tank, wherein the mixer includes a storage passage, various additive injection parts installed inside the storage container, a lid for opening and closing the storage container, A driving motor for driving the mixing means, and a driving motor provided on the bottom surface of the storage tank for discharging various additives mixed by the mixing means. And a door portion provided to the door.

delete

Further, in the structure of the lid for opening / closing the reservoir,

And a lid is coupled to one side surface of the outer circumferential surface of the reservoir in a hinge manner, and a cylinder rod is connected to one end of the lid to open and close the lid in a cylinder operation manner.

The mixing means may include a rotating shaft having a pulley fixed to one end thereof rotatably installed through a storage container, a screw-shaped blade formed on the outer circumferential surface of the rotating shaft, and a mixing member fixedly installed between the screw- .

In addition, the screw-shaped vanes are formed to be mutually symmetrical from the middle of the rotation axis to both sides.

The rotary shaft is composed of a first rotary shaft fixedly installed with a screw-shaped blade and a mixing member, and a second rotary shaft coupled with flanges at both ends of the first rotary shaft.

The mixing member may further include a support rod fixedly installed between the screw blades and a pressing member provided at one end of the support to uniformly mix various additives in the reservoir.

" 또는 "

" 형태를 갖는 것을 특징으로 한다.In addition, the pressing member may have a "

" or "

Quot; shape. ≪ / RTI >

In addition, in the case where the support member is fixedly installed between the screw-shaped wings,

A plurality of pressing members fixed to the support base end portions are provided in close contact with the inner surface of the reservoir and a plurality of spaced apart from the inner surface of the reservoir.

The door portion includes a fixed portion provided on the side of the bottom of the storage container, a pivoting member provided on one side of the fixed portion, a door fixedly installed on the pivoting member for opening and closing the discharge port of the storage container, And a cylinder which is installed and which pivots and pivots the pivoting member.

The additive injection unit may include a first coupling unit and a second coupling unit that are coupled to the first coupling unit and have a plurality of through holes arranged in the longitudinal direction.

As described above, the present invention provides an expandable polystyrene having improved water resistance, heat resistance, flame retardancy, and soundproofness to various industrial fields by providing a foamed polystyrene production apparatus and a manufacturing process to provide foamed polystyrene with improved functionality, And the like can be used as various construction materials.

Further, the present invention includes a mixer having a screw-shaped blade and a mixing member fixed on the outer circumferential surface of a rotating shaft of a low speed rotation type, which is a batch type, between the screw-shaped blades so that the rotating shaft rotates at a constant speed by operation of the driving motor, The EPS raw material, the binder and the additive are mixed evenly to the left and right by the screw type blades which are mutually symmetrically formed on the rotary shaft, and the EPS, the binder and the additive injected into the inside of the storage container by the pressing member of the mixing member organically, It is possible to prevent the adhesion of the EPS, the binder and the additives to the inner surface of the storage container in the process of uniformly mixing the injected EPS, the binder and the additives injected into the storage container.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural view showing components and a manufacturing process of an apparatus for producing expandable polystyrene according to the present invention. FIG.
2 is a structural view showing the internal structure of the mixer according to the present invention.
3 is a structural view showing the internal structure of the mixer according to the present invention;
4 is a side view of the mixer and door portion according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The present invention relates to a process for producing an EPS raw material, which comprises a first hopper 11 to which EPS is charged, a first conveying device 21 for conveying the EPS raw material fed into the first hopper 11, A high frequency surface treatment device 40 for subjecting the EPS raw material stored in the first storage tank 31 to high frequency treatment and a high frequency surface treatment device 40 A second hopper 12 into which the EPS raw material processed by the first hopper 12 is fed, a SCALE hopper 13 in which the EPS raw material fed into the second hopper 12 is weighed to a predetermined weight, A second transfer device 22 for transferring the EPS raw material, a second storage tank 32 for storing the EPS raw material transferred to the second transfer device 22, A binder containing an adhesive, graphite, and a flame retardant is put in a predetermined amount and stirred through an EPS raw material and a binder mixture feeding device 50 stored in the container for 1-2 minutes A mixer 70 that mixes the various additives through the additive addition device 60 to mix them up, down, left, and right, and a conveying and drying device 80 for conveying the EPS raw material coated by the mixer 70 A two-stage sorting device 110 for sorting EPS raw materials coated on the conveying and drying device 80 with dust, debris and high quality coated EPS; A third transfer unit 23 for transferring the coated EPS, a third transfer unit 33 for transferring the coated EPS transferred by the third transfer unit 23, And a packaging machine 120 for packaging the coated EPS stored in the packaging machine 33.

Hereinafter, the configuration of the present invention will be described in more detail.

As shown in Figs. 1 to 3,

The present invention mainly includes the first and second hoppers 11 and 12, the SCALE hopper 13, the first and second and third feeding devices 21, 22 and 23, 31, 32, 33, the high frequency surface treatment device 40, the mixer 70, the binder mixing and feeding device 50, the additive additive device 60, the transfer drying device 80, A dust collecting device 100, and a two-stage sorter 110, and will be described in accordance with a sequence of steps.

The first hopper 11 is formed in the form of a funnel-shaped container in which an injection hole for injecting the EPS raw material into the upper part is formed and an outlet is formed in the lower part for discharging the EPS raw material in a predetermined amount. A safety device having a vibration function 130 for guiding the EPS raw material more efficiently by transmitting the vibration and supporting the first hopper 11 on the outer circumferential surface, Further, a first conveying device 21 is provided for interlocking with the discharge port to convey the EPS raw material to the first storage tank 31.

The high-frequency surface treatment apparatus 40 performs the function of removing foreign matter and finely scraping off the surface of the EPS raw material by using a high frequency. The effect is that the binder and various additives are added to the surface of the EPS raw material By organically co-adhesive coating, they offer the advantage of producing high quality.

The binder mixing and supplying device 50 is provided with a device for uniformly mixing an adhesive, graphite, a flame retardant, etc., and preventing the deposit from adhering to the wall or floor of the mixing and feeding device without deposits. . Further, in the continuous high-speed rotation method, since it is necessary to supply a certain binder, it is a binder having adhesiveness, which makes it difficult to supply a fixed amount.

The additive feeder 60 is connected to a plurality of side hoppers for selecting and adding various additives to be connected to each other. A quantitative feeder for feeding a predetermined amount of additive introduced into each side hopper to the main hopper, After being transferred to the hopper, it can be transported to the mixer through the in-pelletizer to uniformly mix 3-4 kinds of additives in the middle of transferring to the mixer, so that the advantage of selecting and mixing various additives can be provided do.

The transporting and drying device 80 is a mechanical device that automatically and continuously transports a material or an article at a predetermined distance. The structure of an apparatus for transporting a small-sized raw material such as a coated EPS raw material, as in the present invention, And a plurality of elastic members for imparting tension to the vibration of the conveying portion in response to the action of the driving portion are arranged in a plurality of rows on the upper portion of the pedestal 74. The conveying portion includes a conveying portion for conveying the conveying portion, The vibration is transmitted to the conveying unit 81 by the action of the driving unit and the conveying unit is moved and restored in the forward direction by the restoring force to the elastic member so that various articles with little raw materials are effectively conveyed .

Especially, since the binder of liquid phase and the additive of 3-4 kinds of powder are added to the surface of EPS raw material, when the excessive force such as the screw conveying method is applied before the complete drying, the coated binder is dropped, A special device was applied.

The hot air drying device 90 has a plurality of hot air windings arranged in the conveying and drying device 80 to uniformly send low temperature hot air to the coated EPS raw material to dry the hot air, If more than that, pentane or butane gas used as blowing agent will escape, so use hot air at low temperature.

The dust collecting apparatus 100 is provided with a plurality of dust suction ports arranged above the transfer drying apparatus 80 and functions to suck and process various dusts generated in the process of being transferred through the transfer drying apparatus 80.

The two-stage sorting device 110 is a device for sorting EPS raw materials coated on the transporting and drying device 80, and performs a function of sorting waste, dust and high quality coated EPS according to the size of raw materials.

In addition, because EPS raw materials with different EPS raw material particle sizes are required to be used, productivity can be improved and high quality products can be produced by using a two-stage sorting device having a structure in which a mesh network of the sorter can be easily replaced .

The safety device 130 is installed above the first hopper 11 so that the EPS raw material falls down and flows down to the outside of the first hopper 11 in the process of feeding the EPS raw material into the first hopper 11 And at the same time, to guide the ESP to the first hopper 11.

The mixer 70, which is the most important element of the present invention, will be briefly described.

The mixer 70 is an apparatus for mixing and drying EPS raw materials, binders, and various additives, and includes a rotatable mixer for rotating the container by rotating the container to perform a mixing action with the powders entered therein, , A fingerplon, a Z-shaped blade, and the like can be selected and used, and a continuous high-speed rotating vertical mix (Henschel mix type) can be used. However, a high-speed mix is hardly coated on the surface of the EPS raw material There is a problem that the binder coated by the mutual collision with the high-speed rotary blades falls before the binder is dried, resulting in a problem that the coating is not uniformly applied, resulting in an increase in cost due to an increase in the amount of binder used as well as quality deterioration.

In order to solve the above problems, the present invention has adopted a batch-type low-speed rotation type mixer. In order to mix the EPS raw material, the binder and the additives uniformly, a ribbon type impeller It is a special mixer with Y type and Z type wings. It is capable of uniformly mixing EPS raw materials, binders and additives in a short time, and is also easy to dry, Lt; / RTI >

The structure of the mixer of the present invention will now be described in detail with reference to the drawings.

As shown in Fig. 2,

The mixer 70 includes a reservoir 71 having an inlet at an upper portion and a discharge port at an upper portion and an additive injection unit 72 installed at an upper portion of the mixer 70. A lid 73 for opening and closing the inlet of the reservoir 71, A door 74 provided at an outlet of the bottom of the reservoir 71 for discharging various additives uniformly mixed in the reservoir 71 by a mixing means 75, 77).

The mixing means 75 is connected to the pulleys provided on the shaft of the driving motor 76 at one end by a driving belt so as to be rotatable through both sides of the reservoir 71, A screw pulley 75b is formed at a predetermined interval on the outer circumferential surface of the rotary shaft 75a and a pulley is inserted between the screw pulleys 75b, And a mixing member 75c for uniformly mixing the EPS, the binder and various additives to be injected into the upper portion 72, the lower portion, the left portion and the right portion.

The rotary shaft 75a has a first rotary shaft 75a-1 on which a screw-shaped blade 75b and a mixing member 75c are fixed and a flange 75a-3 on both ends of the first rotary shaft 75a-1. The first rotary shaft 75a-1 and the second rotary shaft 75a-2 are provided so as to be capable of engaging and disengaging the first rotary shaft 75a-1 and the second rotary shaft 75a-2, The rotation shaft 75a-1 is separated from the second rotation shaft 75a-2 and cleaned and then connected again to the flange 75a-3, thereby providing an advantage of being very easy to clean.

The various additive material injecting unit 72 includes a first coupling hole 72a and a second coupling hole 72b which are interdigitated with the first coupling hole 72a and have a plurality of through holes 72b, (72c), the coupling portions (72a) and (72c) can be easily released and cleaned at the time of cleaning the injection portion (72).

The screw vanes 75b are formed symmetrically with respect to the intermediate portion of the rotating shaft 75a and are inclined downward in the drawing toward the middle portion so that various additives in the reservoir 71 can be stored in the reservoir 71, By uniformly mixing the mixture in the left and right directions, the EPS is uniformly adhered uniformly to the EPS, the binder and the additive introduced into the reservoir 71, and quickly dried.

" 또는 "

" 와 같은 형태를 갖는다.The mixing member 75c includes a plurality of supporting members 75c-1 fixedly installed between the screw-shaped vanes 75b and a plurality of additives 75c-1 installed at the end of the supporting member 75c- Further comprising a pressing member 75c-2 for performing a function of uniformly mixing the mixture up and down by a rotary shaft 75a and mixing and drying the EPS, the binder and the additive even more effectively in a short period of time, The pressing member 75c-2 has a side surface "

" or "

"

In addition, when the support table 75c-1 is fixed between the screw-type vanes 75b,

A plurality of the pressing members 75c-2 fixed to the end of the support base 75c-1 are disposed in close contact with the inner surface of the reservoir 71 and spaced apart from the inner surface of the reservoir 71, The EPS, the binder and the additives injected into the reservoir 71 can be uniformly mixed with the EPS and the binder uniformly. In addition, in the process of uniformly mixing the EPS, the binder and the additives injected into the reservoir 71, It is possible to prevent the adhesion of the EPS, the binder and the additive to the inner surface of the support 71.

Meanwhile, the door portion 77 is installed on the bottom surface of the storage container 71,

The door portion 77 includes a fixed portion 77a provided at the bottom outlet side of the reservoir 71, a pivoting member 77b pivotally supported on one side of the fixed portion 77a, A door 77c fixed to the opposite side of the fixing portion 77a and connected to the pivoting member 77b so as to rotate the pivoting member 77b by pressing the pivoting member 77b, And further includes a cylinder 77d.

Hereinafter, the operation of each component according to the manufacturing process of the present invention will be described.

As shown in Figs. 2 to 4,

First, the storage bag storing the EPS is conveyed by the conveying means to be positioned above the first hopper 11, the EPS is cut into the first hopper 11 and the first hopper 11 The first transfer device 21 is operated to pressurize the EPS raw material to the first storage tank 31. [

In this state,

 The surface of the EPS raw material stored in the first storage tank 31 is surface-treated with a high frequency to remove the dust adhering to the surface of the EPS raw material or minutely scratch the surface of the EPS raw material. Then, the second hopper 12 and the SCALE And then the second transfer device 22 is moved to the second storage tank 32 after the process of organically fixing the same through the hopper 13.

A binder including an adhesive, graphite, and a flame retardant is put into the mixer 70 to coat the EPS raw material stored in a fixed amount and the binder containing the adhesive in the EPS raw material in the binder mixed supply device 50.

In this state,

First, when the mixer is driven by driving the drive motor 76,

The rotary shaft 75a connected to the drive motor 76 in a pulley-like manner is rotated and the screw-shaped vane 75b which is symmetrically formed on the outer circumferential surface of the rotary shaft 75a is rotated, The binder 75c fixedly installed between the first and second rollers rotates and a binder containing an adhesive, graphite, a flame retardant and the like is firstly uniformly stirred in an up, down, left, (Additives such as anti-blocking agents, antistatic agents, and molding accelerators) are added to the mixer 60 through the agitator 60, and then the mixer is actuated for a short time of about 4-5 minutes to be secondarily stirred. The spinning shaft 75a is rotated at a constant speed so that the EPS raw material, the binder and the additive injected into the mixer 70 are uniformly adhered well and fast drying is performed by performing the kneading process in an upward, downward, left, and right direction .

Here, by attaching 4 to 5 additives with various effects to the double surfaces of the EPS raw materials which are primarily stirred, it is possible to obtain the maximum effect of the additive performance with a small amount, and the EPS raw materials have a black binder It provides the advantage of preventing the color from softening when the white additive is added, thus saving the cost.

After the above process,

The cylinder 77d of the door portion 77 is operated to rotate the pivoting member about the shaft provided at the fixed portion and at the same time the door closing the discharge port of the storage container is rotated to open the discharge port, The EPS raw material coated with the binder and various additives is guided to the conveying portion of the conveying and drying device 80 and then conveyed to the two-stage sorter.

As described above, in the process of transferring the EPS raw material coated with the binder and various additives to the two-stage sorter 110 in the transfer drying apparatus,

The hot air drying device 90 and the dust collecting device 100 are operated at the same time so that the EPS raw material is dried by hot air at a low temperature (30 ° C or less) of the hot air provided in a plurality of hot air drying devices 90, By sucking and dusting various dusts generated in the process of transferring the raw material, it is possible to form an optimum drying condition and to maintain a clean working environment.

The vibration is transferred to the two-stage separator 110 through the above-described process, and the heavy residue is disposed on the upper side and the dust is disposed on the lower side. As a result, And a high quality coated EPS raw material is selected.

The coated EPS raw material selected through the two-stage sorting unit 110 as described above is transferred to the third storage tank 33 by using the third transfer device 23, .

That is, the present invention relates to a process for producing expandable polystyrene according to the operation of the expandable polystyrene apparatus and the apparatus, and it is possible to manufacture expandable polystyrene having improved functions such as water resistance, heat resistance, flame retardancy, Can be provided.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims and their equivalents. It will be understood by those of ordinary skill in the art that various changes and modifications may be made without departing from the scope of the present invention.

11, 12, 13: first hopper, second hopper, SCALE hopper
21, 22, 23: first conveying device, second conveying device, third conveying device
31, 32, 33: a first storage tank, a second storage tank, a third storage tank
40: High frequency surface treatment apparatus.
50: Binder Mix Feeder
60: additive additive
70: Mixer
80: Feed drier
90: Hot air drying device
100: Dust collector
110: two-stage selector
120: Packaging machine
130: Safety device

Claims (11)

A first hopper 11 into which a foamable polystyrene raw material EPS is introduced,
A first conveying device 21 for conveying the EPS raw material injected into the first hopper 11,
A first storage tank 31 for storing the EPS material transferred to the first transfer device 21,
A high frequency surface treatment device 40 for subjecting the EPS raw material stored in the first storage tank 31 to high frequency treatment,
A second hopper 12 into which the EPS raw material processed by the high frequency surface treatment device 40 is injected,
A SCALE hopper 13 in which the EPS raw material charged into the second hopper 12 is weighed to a predetermined weight,
A second conveying device 22 for conveying the EPS raw material inputted into the SCALE hopper 13,
A second storage tank 32 for storing the EPS material transferred to the second transfer device 22,
A binder containing an adhesive, graphite, and a flame retardant is added in a predetermined amount through the EPS raw material stored in the second storage tank 32 in a predetermined amount and the binder mixer 50, and stirred. After 1-2 minutes, A mixer 70 for additionally feeding various additives through the apparatus 60 and mixing them up, down, left, and right,
A transfer drying device 80 for transferring the coated EPS raw material in the mixer 70,
A two-stage sorter 110 for sorting EPS raw materials coated on the conveying and drying device 80 with dust, debris, and EPS coated with high quality;
A third conveying device 23 for conveying the coated EPS selected through the two-stage discriminating device 110,
A third storage tank 33 for storing the coated EPS transferred by the third transfer device 23,
And a packaging machine (120) for packaging the coated EPS stored in the third storage tank (33)
The mixer 70 includes a reservoir 71, various additive injection units 72 installed in the reservoir 71, a lid 73 for opening and closing the reservoir 71, And a driving motor 76 for operating the mixing means 75. The driving motor 76 is installed on the bottom surface of the reservoir 71, And a door portion (77) provided for discharging various additives mixed by the mixing means (75). delete The method according to claim 1,
In the structure of the lid (73) for opening and closing the reservoir (71)
A lid 73 is coupled to one side of the outer circumferential surface of the reservoir 71 in a hinged manner and a rod of a cylinder 77d is connected to one end of the lid 73 so that the lid 73 is opened / Wherein the foamed polystyrene is produced by a method comprising the steps of: The method according to claim 1,
The mixing means 75 includes a rotary shaft 75a having a pulley fixed at one end thereof rotatably installed through the reservoir 71, a screw-shaped blade 75b formed on the outer circumferential surface of the rotary shaft 75a, Shaped blades (75b), and a mixing member (75c) fixedly installed between the blades (75b). 5. The method of claim 4,
Wherein the screw-shaped vanes (75b) are formed symmetrically to each other from the middle of the rotating shaft (75a). 5. The method of claim 4,
The rotary shaft 75a has a first rotary shaft 75a-1 on which a screw-shaped blade 75b and a mixing member 75c are fixed and a flange 75a-3 on both ends of the first rotary shaft 75a-1. And a second rotating shaft (75a-2) coupled to the second rotating shaft (75a-2). 5. The method of claim 4,
The mixing member 75c includes a support base 75c-1 fixedly installed between the screw-type vanes 75b and a support 75c-1 provided at one end of the support base 75c-1 to uniformly mix various additives in the reservoir 71 Further comprising a pressure member (75c-2) provided for the foamed polystyrene. 8. The method of claim 7,
The pressing member 75c-2 has a side surface "

" or "

≪ / RTI > of the foamed polystyrene. 8. The method of claim 7,
The support base 75c-1 is fixedly installed between the screw-type vanes 75b,
A plurality of the outer surface of the pressing member 75c-2 fixed to the end of the supporter 75c-1 are provided in close contact with the inner surface of the reservoir 71 and at a distance from the inner surface of the reservoir 71, A device for manufacturing expandable polystyrene. The method according to claim 1,
The door portion 77 includes a fixed portion 77a provided on the bottom outlet side of the reservoir 71, a pivoting member 77b provided on one side of the fixed portion 77a, A door 77c for opening and closing the discharge port of the reservoir 71 and a cylinder 77d provided on the other side of the fixed portion 77a for pressing and rotating the pivoting member 77b An apparatus for manufacturing expandable polystyrene having improved functionality. The method according to claim 1,
The various additive material injecting unit 72 includes a first coupling hole 72a and a second coupling hole 72b which are interdigitated with the first coupling hole 72a and have a plurality of through holes 72b, (72c). ≪ RTI ID = 0.0 > 18. < / RTI >

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