JP6714445B2 - Mixed material manufacturing apparatus and mixed material manufacturing method - Google Patents

Description

The present invention relates to a mixed material manufacturing apparatus and a mixed material manufacturing method.

In the production of a thermoplastic resin compound, there are many cases where three types of components, that is, a thermoplastic resin pellet, a powdery additive, and a liquid additive are used as raw materials. When these raw materials are melt-kneaded to produce thermoplastic resin compound pellets, the form of the raw material components is greatly different from that of granules, powders, and liquids, so that the raw material components are uniformly supplied. Requires various measures. For example, for each component of granular material, powder, liquid, using a quantitative feeder or a quantitative pump, a method of charging the melt-kneading extruder from a dedicated charging port, a method of charging the melt-kneading extruder with a granular material Body, powder, liquid is premixed using a batch mixer to uniformly mix each component, then put into the melt-kneading extruder, powder or liquid components are granular master A method in which a batch is manufactured in advance and then mixed and charged is used.

However, when adding a small amount of a liquid component, there is a problem that it is difficult to uniformly mix with other raw materials in a short time by addition with a metering pump. In addition, when using a preliminary mixer, liquid components or powdery components containing liquid components may adhere or deposit on the inner wall of the mixer or the inner wall of the hopper that inputs the mixture. As a result, the smooth introduction of raw materials may be hindered, the composition may fluctuate, and impurities may be mixed from the outside. Further, in the method using the masterbatch, it is necessary to further install a melt-kneading device for manufacturing the masterbatch, which causes an increase in manufacturing cost.

Furthermore, if the powdery additive or liquid additive has reactivity with the resin, the degree of reaction of the reaction product becomes non-uniform due to slight compositional variations, and In the thermoplastic resin compound, large variations in physical properties occur.

For example, when manufacturing a water-crosslinkable silane-modified polyethylene resin compound, polyethylene resin pellets, polyethylene resin powder, a liquid silane compound, and a liquid or powder radical generator are used as raw materials. .. Here, the liquid silane compound and the radical generator have reactivity with the polyethylene resin.

Prior art relating to a method for producing a water-crosslinkable silane-modified polyethylene resin compound is, for example, Patent Document 1 and Patent Document 2. In Patent Document 1, a low-density ethylene-based resin powder, an ethylenically unsaturated silane compound, and a radical generator are added to and mixed with a high-density ethylene-based resin pellet, and then the mixture is supplied to a hopper of an extruder and melt-kneaded. A method of manufacturing a crosslinked ethylene resin tube is disclosed. Further, Patent Document 2 discloses a method for producing a crosslinked polyethylene pipe in which a mixture of a polyethylene resin pellet, a polyethylene resin powder, a silane compound and a radical generator is mixed with a mixer and then supplied to an extruder and melt-kneaded. ..

JP, 2005-199633, A JP, 2010-150299, A

In the production method described in Patent Document 1, resin pellets, resin powder, a liquid ethylenically unsaturated silane compound and a radical generator are mixed as raw materials with a Henschel mixer or the like, and then supplied to a hopper of an extruder and melt-kneaded. Then there is a statement. However, the mixing is a batch method using a Henschel mixer or the like, and liquid components or powdery components containing liquid components adhere and deposit on the inner wall of the mixer or the hopper that inputs the mixture. I have a concern.

Further, in the production method described in Patent Document 2, there is a description that resin pellets, resin powder, a liquid silane compound and a radical generator are mixed in a mixer and then supplied to an extruder. However, similar to Patent Document 1, the mixing is a batch type using a mixer, and there is a concern that liquid components or powder components containing liquid components may adhere to or deposit on the inner wall of the mixer. ..

The present invention has been made in view of the above circumstances. That is, the present invention is a mixed material manufacturing apparatus and a mixed material manufacturing method capable of continuously mixing a granular resin, a powder and a liquid, and supplying them to a melt-kneading apparatus, etc. An object of the present invention is to provide a mixed material manufacturing apparatus and a mixed material manufacturing method capable of supplying a mixed material by reducing the adhesion and deposition and suppressing the fluctuation of the raw material composition.

As a result of examining the structure and manufacturing conditions of a mixing device for granular resin, powder and liquid, the present inventors have found a structure of a manufacturing device and a manufacturing method that can solve the above problems, and have completed the present invention. .. That is, the present invention has the following configurations.

(1) The mixed material manufacturing apparatus of the present invention is a mixed material manufacturing apparatus which continuously mixes and discharges granular resin, powder and liquid at a temperature not higher than the heat distortion temperature of the granular resin. A cylindrical mixing tank housed therein, a motor for driving the rotary blades, a hopper for supplying granular resin to the mixing tank, a powder supply device for supplying powder to the mixing tank, the mixing tank or A liquid supply device for supplying a liquid to the powder supply device, wherein the mixing tank internally separates the granular resin that is not mixed with the liquid and the granular resin that is mixed with the liquid. In the mixing tank, the rotary vanes are rotated to mix the granular resin with the powder and the liquid, and are conveyed in the downstream direction, and the obtained mixed material is discharged from the discharge port. The feature is to let.

(2) In the mixed material manufacturing apparatus of the present invention, it is preferable that the rotary blade is capable of scraping the mixed material adhering to the inner wall of the mixing tank while rotating.

(3) In the mixed material manufacturing apparatus of the present invention, it is preferable that the powder supply apparatus is an apparatus that supplies powder by a conveying unit having a spiral rotating body inside.

(4) In the mixed material manufacturing apparatus of the present invention, it is preferable that the liquid supply device is a device that supplies liquid by a positive displacement pump.

(5) In the mixed material manufacturing apparatus of the present invention, the mass ratio of the powder and the liquid to the granular resin is 50 mass% of the granular resin, the powder and the liquid supplied per unit time. The following is preferable.

( 6 ) In the mixed material manufacturing apparatus of the present invention, it is preferable that the mixing tank is closed except for the inlet for the granular resin, the powder and the liquid, and the outlet.

( 7 ) In the mixed material manufacturing apparatus of the present invention, it is preferable that the granular resin is a thermoplastic resin pellet, and the powder and the liquid are each a thermoplastic resin additive.

( 8 ) It is preferable that the mixed material manufacturing apparatus of the present invention is used to supply a mixed material composed of the thermoplastic resin pellets and the thermoplastic resin additive to a melt-kneading apparatus.

( 9 ) In the mixed material manufacturing method of the present invention, a granular mixing resin, powder and liquid are continuously mixed at a heat deformation temperature of the granular resin or lower by using a cylindrical mixing tank having rotary blades housed therein. The mixing tank manufacturing method, wherein the mixing tank is provided with a partition wall for partitioning the granular resin not mixed with the liquid and the granular resin mixed with the liquid, In the inside, while rotating the rotary blade to mix the granular resin with the powder and the liquid, the granular resin is conveyed in the downstream direction and discharged as a mixed material.

( 10 ) In the mixed material manufacturing method of the present invention, it is preferable to scrape off the mixed material adhered to the inner wall of the mixing tank by the rotating blade while rotating the rotating blade.

( 11 ) In the method for producing a mixed material according to the present invention, in the granular resin, the powder and the liquid supplied per unit time, the mass ratio of the powder and the liquid to the granular resin is 50% by mass, respectively. The following is preferable.

( 12 ) In the mixed material manufacturing method of the present invention, it is preferable to mix in a closed environment.

( 13 ) In the mixed material manufacturing method of the present invention, it is preferable that the granular resin is a thermoplastic resin pellet, and the powder and the liquid are each a thermoplastic resin additive.

( 14 ) The mixed material manufacturing method of the present invention is preferably used to supply a mixed material composed of the thermoplastic resin pellets and the thermoplastic resin additive to a melt-kneading device.

( 15 ) In the mixed material manufacturing method of the present invention, it is preferable that at least one of the thermoplastic resin additives has reactivity with the thermoplastic resin of the thermoplastic resin pellets.

According to the present invention, it is possible to continuously mix the granular resin, the powder and the liquid and supply them to the melt-kneading device, etc., to reduce the adhesion/deposition on the inner wall of the device and to change the raw material composition. It is possible to supply the mixed material while suppressing the above.

(A) It is a schematic side view of the mixed material manufacturing apparatus of 1st Embodiment. (B) It is a schematic front view of the mixed material manufacturing apparatus of 1st Embodiment. (A) It is a schematic side view of the mixed material manufacturing apparatus of 2nd Embodiment. (B) It is a schematic front view of the mixed material manufacturing apparatus of 2nd Embodiment. (A) It is a schematic side view of the rotary blade of 1st Embodiment. (B) It is a schematic front view of the rotary blade of 1st Embodiment. (C) It is a schematic perspective view of the rotary blade of the first embodiment. (A) It is a schematic side view of the rotary blade of 2nd Embodiment. (B) It is a schematic front view of the rotary blade of 2nd Embodiment. (C) It is a schematic perspective view of the rotary blade of 2nd Embodiment. (A) It is a schematic side view of the rotary blade of 3rd Embodiment. (B) It is a schematic front view of the rotary blade of 3rd Embodiment. (C) It is a schematic perspective view of the rotary blade of 3rd Embodiment. (A) It is a schematic side view of the rotary blade of 4th Embodiment. (B) It is a schematic front view of the rotary blade of 4th Embodiment. (C) It is a schematic perspective view of the rotary blade of 4th Embodiment.

Embodiments of the present invention will be described below. However, the embodiments of the present invention are not limited to the following embodiments.

(Mixed material manufacturing method)
The mixed material manufacturing method of the present embodiment is a mixed material manufacturing method in which a granular resin, a powder and a liquid are continuously mixed at a heat distortion temperature of the granular resin or lower. More specifically, by using a cylindrical mixing tank having rotating blades housed therein, the rotating blades are rotated in the mixing tank to mix the granular resin with the powder and the liquid, and the particles are conveyed in the downstream direction. It is a manufacturing method of discharging as a mixed material.

In the mixed material manufacturing method of the present embodiment, the specific contents of the granular resin, the powder and the liquid are not particularly limited, and the applications to be applied are not particularly limited. As the application, it can be used, for example, in the production of molding resin compounds, paints, adhesives, pressure-sensitive adhesives, and the like. Each of the granular resin, powder and liquid may be one kind or a mixture of two or more kinds.

A typical application to which the method for producing a mixed material according to the present embodiment is applied is production of a resin compound for molding. In this case, the granular resin, the powder, and the liquid, which are the raw material components of the molding resin compound, are mixed by the mixed material manufacturing method of the present embodiment. In a typical application example assumed in the present embodiment, the granular resin is a thermoplastic resin pellet, and the powder and the liquid are the thermoplastic resin additives.

Conventionally, when a molding resin compound is produced, since the forms of the raw material components of the granular resin, the powder, and the liquid are greatly different, usually, before feeding these raw material components to the hopper of the melt-kneading extruder, a batch type A method has been used in which the components are mixed uniformly using a preliminary mixer. However, when a batch type preliminary mixer is used, liquid components or powdery components containing liquid components adhere to the inner wall of the mixer or the inner wall of a hopper that inputs the mixture. May accumulate. As a result, there is a concern that smooth introduction of raw materials into the melt-kneading extruder may be hindered, compositional fluctuations may occur, and impurities from the outside may be mixed.

Furthermore, if the liquid additive is reactive with the granular or powdery resin, or if the liquid additive itself is reactive, a batch type preliminary mixer is used. When each component is mixed using, the reaction between the liquid additive and the resin may partially proceed, or the reaction of the liquid additive itself may partially proceed. As a result, the mixture firmly adheres to and deposits on the inner wall of the mixer, the inner wall of the hopper, and the like, making it difficult to remove the mixture.

Further, if the powdery additive or liquid additive has reactivity with the resin, the degree of reaction of the reaction product becomes non-uniform due to a slight variation in composition, and In the thermoplastic resin compound, large variations in physical properties occur.

As a molding resin compound in which the additive has reactivity with the resin, there is, for example, a water-crosslinking silane-modified polyethylene resin compound. Examples of the raw materials for the water-crosslinkable silane-modified polyethylene resin compound include polyethylene resin pellets, polyethylene resin powder, liquid silane compounds, and liquid or powder radical generators. When the liquid silane compound is heated in the presence of the radical generator, it reacts with the pellet-shaped or powder-shaped polyethylene resin to silane-modify polyethylene.

However, the silane compound may react with moisture in the air and partially solidify. Further, the silane compound may partially react with the polyethylene resin when mixed at room temperature in the presence of the radical generator. Therefore, when the respective components are mixed at room temperature using a batch type preliminary mixer, the mixture may firmly adhere and stay on the inner wall of the mixer, the outlet, the inner wall of the hopper, and the like. These deposits are layered over time, react with moisture, and solidify and deposit more strongly. Further, a phenomenon occurs in which the solidified product of the mixture adhering to the inner wall or the like suddenly peels off and is mixed with other components.

As a result, not only does the composition and physical properties of the obtained molding resin compound vary, but the solidified material such as a silane compound hinders the operation of the moving part of the manufacturing apparatus, and the joint part and the opening/closing part of the manufacturing apparatus are disturbed. It will stick and prevent the device from opening and closing. Therefore, it is necessary to periodically remove the solidified substance adhering to the inside of the manufacturing apparatus, and the removing operation itself requires a lot of trouble.

As described above, in the production of the water-crosslinkable silane-modified polyethylene resin compound, when a batch type preliminary mixer is used, many problems occur during the production, resulting in a decrease in productivity and a uniform product physical property. It has caused a decline in sex.

Therefore, the present inventors have examined the structure and manufacturing conditions of the preliminary mixer. First, by constantly operating the mixer as a continuous type, in intermittent operation of the batch type mixer, it is possible to suppress the formation of a solidified product by leaving the mixture stationary and the occurrence of deposits. ..

Next, in the structure of the mixer, using a cylindrical mixing tank having rotating blades housed therein, the rotating blades are rotated in the mixing tank to continuously mix the granular resin, powder and liquid. I was able to do it. Then, the mixture was mixed, conveyed in the downstream direction, and discharged as a mixed material. As a result, it was possible to suppress the formation of solidified substances and the formation of deposits by constantly stirring and mixing or moving the mixture of the granular resin, the powder and the liquid. Further, by making the mixing tank cylindrical, the dead space was eliminated and the accumulation was prevented.

At this time, the rotary blade is configured to scrape off the mixed material adhering to the inner wall of the mixing tank by the rotary blade while rotating. As a result, it is possible to prevent the mixture, the silane compound, and the like from solidifying and adhering and the solidified material from peeling off. The specific shape of the rotary blade will be described later.

Moreover, the mixing tank is designed to be able to mix in a closed environment. As a result, it is possible to prevent water and contaminants from being mixed into the system, and it is possible to suppress solidification due to reaction with water and deterioration of uniformity due to mixing of foreign matter.

In the present embodiment, the temperature at which the granular resin, the powder and the liquid are mixed is equal to or lower than the heat deformation temperature of the granular resin, and is usually room temperature. This means that in the present embodiment, the form of the granular resin after mixing is substantially the same as the form before the mixing operation. That is, before and after the mixed material manufacturing method of the present embodiment, the granular resin is mixed without substantially changing its form.

The heat distortion temperature of the resin in the present embodiment is usually measured as the deflection temperature under load according to JIS K7191-1:2007. When the bending stress is 1.80 MPa, it is about 30 to 40° C. for low density polyethylene, and about 40 to 55° C. for high density polyethylene.

A typical usage of the mixed material manufacturing method of the present embodiment is, as described above, used to continuously supply a mixed material composed of thermoplastic resin pellets and powder and a liquid thermoplastic resin additive. It Furthermore, when a molding resin compound is produced using a melt-kneading device, it can be used as a pre-mixer for mixing raw material components of the molding resin compound and supplying the mixture to the melt-kneading device.

The mixed material manufacturing method of the present embodiment is performed when at least one kind of the additive for thermoplastic resin has reactivity with the thermoplastic resin of the thermoplastic resin pellet, such as a silane compound. However, it is possible to suppress the solidification and adhesion of the mixture, the silane compound, and the like, and to manufacture a thermoplastic resin compound having uniform physical properties with little fluctuation in the raw material composition.

In the mixed material manufacturing method of the present embodiment, the compositions of the granular resin, powder and liquid are not particularly limited. However, when the mass ratio of the powder and the liquid to the granular resin is 50% by mass or less among the granular resin, the powder and the liquid supplied per unit time, the powder and the liquid are not formed on the surface of the granular resin. Since the adhered and stable form is obtained, the effect of the present embodiment is effectively exhibited.

(Mixed material manufacturing equipment)
A mixed material manufacturing apparatus for specifically carrying out the mixed material manufacturing method of the present embodiment will be described below with reference to the drawings by using two embodiments.
FIG. 1A is a schematic side view of the mixed material manufacturing apparatus 20 of the first embodiment. FIG. 1B is a schematic front view of the mixed material manufacturing apparatus 20 according to the first embodiment.

The mixed material manufacturing apparatus 20 of the first embodiment is an apparatus that continuously mixes and discharges the granular resin, the powder, and the liquid at the heat distortion temperature of the granular resin or lower. The mixed material manufacturing apparatus 20 of the first embodiment includes a cylindrical mixing tank 4 in which rotary blades 5 are housed, a driving motor 7 for the rotary blades 5, and a hopper 1 for supplying granular resin to the mixing tank 4. And a powder supply device 10 for supplying powder to the mixing tank 4, and a liquid supply device (not shown) for supplying liquid to the mixing tank 4.

The mixed material manufacturing apparatus 20 of the first embodiment rotates the rotary blades 5 in the mixing tank 4 to mix the granular resin with the powder and the liquid, and conveys the mixed resin in the downstream direction to obtain the mixed material. It can be discharged from the discharge port 11.

The cylindrical mixing tank 4 is installed so that the rotary shaft 8 is inclined, and the mixed material is installed so that the mixed material moves while being mixed by the rotating blades and naturally falls from the discharge port 11 by gravity. There is. The angle of inclination of the rotary shaft 8 is not particularly limited, but is preferably 3 to 40 degrees with respect to the horizontal. The rotating shaft 8 can be held horizontally without tilting, and conversely, can be held parallel to the vertical direction. Since the rotary blades 5 are inclined or spiral as described later, even if the rotary shaft 8 is held horizontally, the mixed material is moved (propulsed) toward the discharge port 11. be able to.

The inner surface of the mixing tank 4 is also cylindrical, and the rotating blade 5 having the rotating shaft 8 is housed therein. The rotating shaft 8 is rotated by the driving motor 7, and the rotating blade 5 is rotated to mix the mixing tank 4. The inside of 4 can be agitated. The rotary blade 5 extends until the end thereof just before coming into contact with the inner wall of the mixing tank 4, and is configured to sweep the entire cylindrical inner wall surface of the mixing tank 4 by rotating once. Therefore, the rotary blade 5 can scrape off the mixed material adhering to the inner wall of the mixing tank 4 while rotating, without producing a dead space. That is, the mixing tank 4 has a self-cleaning effect of cleaning the inside with the rotating blades 5 while continuously stirring and mixing the mixed material.

A specific shape of the rotary blade 5 will be described. 3 to 6 show the rotary blades 41 to 44 of the first to fourth examples as specific examples of the shape of the rotary blade 5. 3 to 6, each of the rotary blades 41 to 44 has a structure in which a plurality of blades including a fin portion 31 and support portions 32 that support both ends of the fin portion 31 are fixed to the rotary shaft 8. There is.

3A is a schematic side view of the rotary blade 41 of the first example, FIG. 3B is a schematic front view of the rotary blade 41 of the first example, and FIG. 4] is a schematic perspective view of the rotary blade 41 of the first example. The rotary blade 41 of the first example has the same length as the inner wall of the mixing tank 4, and has four blades that are twisted and inclined in the length direction.

FIG. 4A is a schematic side view of the rotary blade 42 of the second example, FIG. 4B is a schematic front view of the rotary blade 42 of the second example, and FIG. 8] is a schematic perspective view of the rotary blade 42 of the second example. The rotary blade 42 of the second example has the same length as the inner wall of the mixing tank 4, and has two blades that are twisted and inclined in the length direction.

5A is a schematic side view of the rotary blade 43 of the third example, FIG. 5B is a schematic front view of the rotary blade 43 of the third example, and FIG. 8] is a schematic perspective view of a rotary blade 43 of a third example. The rotating blade 43 of the third example has a length that is approximately one fourth of the length of the inner wall of the mixing tank 4, and two blades that are twisted and inclined in the length direction are alternately rotated by about 90°. It has a total of eight blades installed.

6A is a schematic side view of the rotary blade 44 of the fourth example, FIG. 6B is a schematic front view of the rotary blade 44 of the fourth example, and FIG. 8] is a schematic perspective view of a rotary blade 44 of a fourth example. The rotary blade 44 of the fourth example has the same length as the inner wall of the mixing tank 4, and has two blades that are not twisted or inclined.

In addition to the shapes of the rotary blades shown in FIGS. 3 to 6, various shapes can be used as the rotary blades. A rotary blade having a so-called spiral shape (screw shape) can also be used.

The granular resin is supplied from the hopper 1 to the mixing tank 4. The hopper 1 is provided with a discharge port 2 for sampling a part of the granular resin and a shutter 3 for adjusting the supply amount from the hopper 1. Further, the hopper 1 has a charging port (not shown) opened in the mixing tank 4 so that the granular resin can be charged into the mixing tank 4 from the uppermost part of the mixing tank 4.

The powder is supplied to the mixing tank 4 by the powder supply device 10. The powder supply device 10 is a device that supplies powder by means of a conveying means having a spiral rotator inside. The powder supply device 10 is provided with a drive device 18 for rotating an internal spiral rotor and a hopper 16 for supplying the powder to the inside of the powder supply device 10. By rotating the spiral rotor inside the powder supply device 10, a predetermined amount of powder out of the powder input from the hopper 16 is input into the mixing tank 4 through the input port 9.

The liquid is supplied to the mixing tank 4 by the liquid supply device. The liquid supply device is a device that supplies liquid by a positive displacement pump. In FIG. 1, only the liquid input pipe 6 of the liquid supply device is shown. A positive displacement pump is a pump that can quantitatively deliver a liquid. Positive displacement pumps are roughly classified into reciprocating pumps and rotary pumps. Reciprocating pumps include piston pumps, plunger pumps, diaphragm pumps and the like. The rotary pump includes a gear pump, a vane pump, a screw pump, and the like. Either type of pump can be used if desired. The liquid supply device charges a predetermined amount of liquid into the mixing tank 4 through the liquid charging pipe 6.

The mixing tank 4 is provided with a partition wall 17 for partitioning the granular resin not mixed with the liquid and the granular resin mixed with the liquid. The partition wall 17 is a substantially semicircular fan-shaped thin plate, and can partition the upper half of the mixing tank 4. The granular resin is charged into the mixing tank 4 from the hopper 1 and the powder is charged from the charging port 9, but at this time, the liquid is not charged. Then, the liquid is introduced from the liquid introducing pipe 6 of the liquid supply device. Since the partition wall 17 is installed on the upstream side of the liquid injection pipe 6 of the liquid supply device, it does not mix the granular resin and powder not mixed with the liquid and the granular resin and powder mixed with the liquid. It is divided into Thus, the partition wall 17 has a function of preventing the liquid from flowing back to the upstream side of the river, and has an effect of improving the mixing accuracy.

The mixed material mixed in the mixing tank 4 is discharged from the discharge port 11 and directly dropped into the melt-kneading device 14 installed below the mixing tank 4. Therefore, in the process of moving the mixed material to the melt-kneading device 14, the mixed material is suppressed from adhering and solidifying to the inner wall or the like in the device. Further, the mixing tank 4 is provided with a shutter 13 for adjusting the discharge amount from the discharge port 11 and a discharge port 19 for sampling a part of the mixed material. The melt-kneading device 14 includes a screw 15 for melt-kneading inside.

The mixing tank 4 is normally closed except for the granular resin charging port, the powder charging port 9, the liquid charging port and the discharge port 11. Therefore, it is possible to prevent water and contaminants from being mixed into the system, and it is possible to suppress solidification due to reaction with water and deterioration of uniformity due to mixing of foreign matter.

As described in the description of the mixed material manufacturing method, the mixed material manufacturing apparatus 20 of the first embodiment uses the thermoplastic resin pellets and powder when manufacturing the molding resin compound using the melt kneading device 14. And a liquid thermoplastic additive can be used for continuous feeding of a mixed material. That is, it is effective as a pre-mixer for continuously supplying the melt-kneading device 14 with a mixed material consisting of the thermoplastic resin pellets and the powder and the liquid additive for the thermoplastic resin.

Further, in the mixed material manufacturing apparatus 20 of the first embodiment, at least one of the additives for thermoplastic resin has reactivity with the thermoplastic resin of the thermoplastic resin pellet, such as a silane compound. Even when it is present, it is possible to suppress the solidification and adhesion of the mixture, the silane compound and the like, and to produce a thermoplastic resin compound having uniform physical properties with little fluctuation in the raw material composition.

Further, the mixed material manufacturing apparatus 20 of the first embodiment is not particularly limited in composition of the granular resin, the powder and the liquid. When the mass ratio of the powder and the liquid is 50% by mass or less, the powder and the liquid adhere to the surface of the granular resin in a stable form, so that the effect of the present embodiment is effectively exhibited.

FIG. 2A is a schematic side view of the mixed material manufacturing apparatus 21 of the second embodiment. FIG. 2B is a schematic front view of the mixed material manufacturing apparatus 21 according to the second embodiment. The mixed material manufacturing apparatus 21 of the second embodiment is different from the mixed material manufacturing apparatus 20 of the first embodiment in the position of the liquid feeding pipe 6 of the liquid supply device that supplies the liquid to the mixing tank 4. That is, in the mixed material manufacturing apparatus 21 of the second embodiment, the liquid is supplied to the powder supply apparatus 10 without being directly charged into the mixing tank 4. As a result, the liquid is put into the mixing tank 4 as a mixture mixed with the powder.

Further, in the mixed material manufacturing apparatus 21 of the second embodiment, the position of the powder inlet 9 when the powder is supplied to the mixing tank 4 by the powder supply apparatus 10 is the mixed material manufacturing apparatus 20 of the first embodiment. Is different from At this time, as described above, the liquid is already mixed in the powder charged by the powder supply device 10.

In the mixed material manufacturing apparatus 21 of the second embodiment, the position of the partition wall 17 for partitioning the granular resin not mixed with the liquid and the granular resin mixed with the liquid is the same as that of the mixed material manufacturing apparatus 20 of the first embodiment. does not change. The partition wall 17 partitions the granular resin that is not mixed with the liquid and the granular resin and the powder that are mixed with the liquid so as not to mix. In this way, the partition wall 17 has a function of preventing the mixed liquid and powder from flowing back to the upstream side of the river, and has an effect of improving the mixing accuracy.

Compared to the mixed material manufacturing apparatus 20 of the first embodiment, in the mixed material manufacturing apparatus 21 of the second embodiment, by preliminarily mixing the liquid and the powder, it is possible to further suppress the classification and separation between the components. Therefore, it becomes easy to control the mixing of the powder and the liquid with respect to the granular resin.

The mixed material manufacturing apparatus 21 of the second embodiment is the same as the mixed material manufacturing apparatus 20 of the first embodiment except that the position of supplying the liquid and the position of the powder inlet 9 are different as described above. , And other explanations are omitted.

As described above, the mixed material manufacturing method and the mixed material manufacturing apparatus of the present embodiment can continuously mix the granular resin, the powder and the liquid, and supply them to the melt-kneading device or the like. At that time, since the adhesion of the mixed material and the silane compound to the inner wall of the apparatus is reduced without causing the accumulation and retention of the mixed material, the fluctuation of the raw material composition is suppressed, and the mixture having a uniform composition is stably supplied. be able to. In addition, continuous operation is possible, and maintenance of the device is easy.

1 Hopper 2 Discharge Port 3 Shutter 4 Mixing Tank 5 Rotating Blade 6 Liquid Input Pipe 7 Drive Motor 8 Rotation Shaft 9 Input Port 10 Powder Supply Device 11 Discharge Port 13 Shutter 14 Melt Kneading Device 15 Screw 16 Hopper 17 Partition 18 Drive Device 19 Discharge port 20, 21 Mixed material manufacturing device

Claims (15)

A mixed material manufacturing apparatus for continuously mixing and discharging a granular resin, a powder and a liquid at a heat distortion temperature of the granular resin or lower,
A cylindrical mixing tank with rotating blades inside,
A motor for driving the rotary blade,
A hopper for supplying granular resin to the mixing tank,
A powder supply device for supplying powder to the mixing tank,
A liquid supply device for supplying a liquid to the mixing tank or the powder supply device,
The mixing tank is provided with a partition wall for partitioning the granular resin not mixed with the liquid and the granular resin mixed with the liquid,
In the mixing tank, while rotating the rotary blade to mix the granular resin with the powder and the liquid, the granular resin is conveyed in a downstream direction, and the obtained mixed material is discharged from an outlet. Mixed material manufacturing equipment. The mixed material manufacturing apparatus according to claim 1, wherein the rotary blade is capable of scraping the mixed material adhering to the inner wall of the mixing tank while rotating. The mixed material manufacturing apparatus according to claim 1 or 2, wherein the powder supply device is a device that supplies powder by a conveying unit having a spiral rotator therein. The said liquid supply apparatus is an apparatus which supplies a liquid with a positive displacement pump, The mixed material manufacturing apparatus of any one of Claims 1-3 characterized by the above-mentioned. Of the granular resin, the powder and the liquid supplied per unit time, the mass ratio of the powder and the liquid to the granular resin is 50% by mass or less, respectively. 4. The mixed material manufacturing apparatus according to any one of 4 above. The mixing vessel, wherein the particulate resin, mixed material prepared according to any one of claims 1 to 5, wherein the powder and inlet of the liquid, and other than the discharge port is characterized in that it is closed apparatus. Wherein the particulate resin is a thermoplastic resin pellets, mixing material production apparatus according to any one of claims 1 to 6, characterized in that the powder and the liquid are each additive for thermoplastic resins. The mixed material manufacturing apparatus according to claim 7 , which is used to supply a mixed material composed of the thermoplastic resin pellets and the thermoplastic resin additive to a melt-kneading device. A method for producing a mixed material, which comprises continuously mixing a granular resin, a powder and a liquid at a heat distortion temperature of the granular resin or lower by using a cylindrical mixing tank having rotary blades housed therein,
The mixing tank is provided with a partition wall for partitioning the granular resin not mixed with the liquid and the granular resin mixed with the liquid,
A method for producing a mixed material, characterized in that, while rotating the rotary blades in the mixing tank to mix the granular resin with the powder and the liquid, the granular resin is conveyed in a downstream direction and discharged as a mixed material. The method for producing a mixed material according to claim 9 , wherein the rotating blade is used to scrape off the mixed material adhering to the inner wall of the mixing tank while rotating the rotating blade. Wherein the particulate resin supplied per unit time, the powder and of the liquid, according to claim 9 or, wherein the powder and the weight ratio of said liquid to said particulate resin is 50 wt% or less, respectively The mixed material manufacturing method according to claim 10 . Mixed material manufacturing method according to any one of claims 9-11, characterized by mixing in a closed environment. Wherein the particulate resin is a thermoplastic resin pellets, mixing material production method according to any one of claims 9-12, wherein the powder and the liquid are each additive for thermoplastic resins. The method for producing a mixed material according to claim 13 , wherein the method is used for supplying a mixed material composed of the thermoplastic resin pellets and the additive for thermoplastic resin to a melt-kneading device. 15. The mixed material according to claim 13 or 14 , wherein at least one of the additives for the thermoplastic resin has reactivity with the thermoplastic resin of the thermoplastic resin pellets. Production method.

Images