JP6224367B2 - Processing material mixing equipment - Google Patents

Description

  The present invention relates to a mixing apparatus for processing materials such as pellets for plastic molding.

  As an apparatus for mixing plastic molding pellets, for example, in Patent Document 1 below, two or more types of pellets are spontaneously dropped from each hopper located at the same height into a shooter having an inclination angle of 45 degrees or more in a distributed manner. In addition, it is disclosed that most of the pellets that bounce off after colliding with the inclined wall portion of the shooter finally bounce off on the opposite wall surface to uniformly mix these pellets. Although the transport force for mixing is not necessary in this technique, there is a problem that the material cannot be sufficiently mixed unless the material is dropped little by little. Moreover, since the powder and fine particles adhering to the pellet cannot be removed, the defective rate of the molded product is increased.

  On the other hand, the following patent document 2 discloses a technique for transporting and mixing materials by suction and removing fine particles and the like attached to the materials. Patent Document 2 includes a flow hopper connected to a suction air source, a supply pipe composed of a vertical pipe communicated in the vertical direction with an inlet / outlet of the flow hopper, and a horizontal pipe connected in the horizontal direction to the vertical pipe, An apparatus comprising a temporary storage hopper connected to a supply pipe is disclosed. And a level meter for detecting the filling level of the material is provided in the vicinity of the lowermost extension line in the lateral pipe of the supply pipe or in a position above the extension line, and between the flow hopper and the canopy part, A filter that passes the transport gas and fine powder without passing through the material is provided.

JP-A-5-103961 Japanese Patent No. 3767993

  However, in the technique described in Patent Document 2 described above, since the material supplied from the horizontal pipe connected to the vertical pipe is sucked upward, a suction force that can be sucked upward against the weight of the material. Is required. Further, since the vertical pipe and the horizontal pipe are provided below the flow hopper, the apparatus becomes large and complicated.

  The present invention pays attention to the above points and can mix and agitate the processing materials efficiently with a small transportation force, and can be processed with a simple configuration suitable for separation of powders and fine particles and miniaturization. The object is to provide a material mixing device.

The processing material mixing apparatus of the present invention is provided with a substantially circular front surface and back surface across a substantially ring-shaped side surface having a predetermined width, and a hopper for mixing a solid processing material, under the hopper. A work material discharge port provided on the side, a first opening provided on the side surface for introducing the work material, and the work material is introduced into the hopper through the first opening. The material supply nozzle, which is provided in the hopper, has a second opening for exhaust, which is located above the tip of the nozzle for supplying material , one end connected to the second opening, and the other end An exhaust nozzle connected to an exhaust means provided outside the hopper and provided inside the hopper so as to cover the second opening, and separates powder and fine particles from the processing material In addition, the processed material after separation is Filter means for guiding so easily brought into contact with the processing material supplied from a material the tip of the supply nozzle is provided above the filter means a side of the hopper, the processing during rotation within said hopper Guide means for guiding the material to the filter means, and a detection means for detecting the presence or absence of the processed material, provided above the discharge port, are introduced from the material supply nozzle. Further, the processing material is rotated in the hopper along the side surface of the hopper by the suction force of the exhaust means, and at this time, the processing material is guided to the filter means by the guide means. It is characterized in that powders and fine pieces are separated from the processing material and discharged from the exhaust nozzle .

  One of the main forms is characterized in that the tip of the material supply nozzle and the detection means are arranged at the same height. In another embodiment, the material supply nozzle is obliquely penetrated through the first opening so that the tip thereof faces downward. Still another embodiment is a cut surface formed such that the tip of the material supply nozzle is inclined with respect to the axial direction of the material supply nozzle, and the processing material supply port faces downward. It is characterized by being. Yet another embodiment is characterized in that the cut surface is substantially horizontal. Still another embodiment is characterized in that a blocking portion for closing a part of the cut surface is provided. Yet another embodiment is characterized in that the blocking portion is provided so that a supply port through which a processed material passes is formed on both sides of the blocking portion.

  In still another embodiment, the filter means is formed with a predetermined length along the side surface of the hopper, or the filter means is formed in a central portion of the back surface of the hopper and in a direction substantially orthogonal to the back surface. It is characterized by being formed in a substantially cylindrical shape. Yet another embodiment is characterized in that the filter means has a tapered surface.

Yet another embodiment, the filter means, the filter 2 kinds size or shape is different the passage of the air, and having a layered structure stacked in two layers. Still another embodiment is characterized in that the area of the air passage portion of the filter on the second opening side is larger than the area of the air passage portion of the outer filter. Still another embodiment is characterized in that a processing material is guided by the guide means to the outer filter . Yet another embodiment is characterized in that the processing material is a plastic material for plastic molding. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

According to the present invention, the first opening and the material for introducing the processing material to the side surface provided with the processing material discharge port below the substantially ring-shaped side surface and the substantially circular front and back hoppers. A supply nozzle is provided, and a second opening for exhaust and an exhaust nozzle are provided in the hopper. Then, filter means for separating powder and fine particles from the processing material guided by the guide means is provided so as to cover the second opening inside the hopper, and whether or not the processing material is present above the discharge port. Detection means for detection is provided, and the second opening is arranged above the tip of the material supply nozzle. Further, the processing material being rotated in the hopper is guided by the filter means so as to easily come into contact with the processing material supplied from the tip of the material supply nozzle. For this reason, the processing material can be introduced into the hopper, mixed and stirred by exhausting with the exhaust nozzle. In addition, the structure utilizing the substantially circular hopper shape enables efficient introduction, mixing, and stirring of the processing material even with a small suction force (pneumatic transport force). Furthermore, since the powder and fine particles adhering to and mixed with the work material are separated by the centrifugal force using the centrifugal force, the defect rate of the molded product can be reduced when applied to the plastic material.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Example 1 of this invention, (A) is an external appearance perspective view which shows the whole structure of a mixing apparatus, (B) is sectional drawing of the front part of a hopper, (C) shows the structure of an upper filter. It is a top view. It is a figure which shows the effect | action of the said Example 1. FIG. It is an external appearance perspective view of the mixing apparatus of Example 2 of this invention.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing the present embodiment, (A) is an external perspective view showing the overall configuration, (B) is a cross-sectional view of the front portion of the hopper, and (C) is a plan view showing the structure of the upper filter. It is. FIG. 2 is a diagram illustrating the operation of the present embodiment. In this embodiment, the present invention is applied to transportation, mixing (or stirring), and separation of deposits of a plastic molding material (hereinafter referred to as “plastic material”). The plastic material includes virgin material pellets, recycled pellets using waste plastic, spools, and other crushed materials of scrap material.

  Since powders and fine pieces enter the gaps between these plastic materials, the resin density changes when the resin is metered into the molding machine cylinder if it is used as it is. Also, since the melting rate of the material varies depending on the size of the plastic material, it burns first from the small ones such as powder and fine pieces, becomes black spots, and when further heated, this part burns out and becomes ash It becomes a white spot. If white spots are introduced in this way, the defective rate of the molded product (product) increases, and therefore, when sending the plastic material to the cylinder for the molding machine, it is necessary to remove the powder and fine particles. The present invention is for mixing a plastic material and removing powder and fine particles.

  As shown in FIG. 1A, the mixing apparatus 10 of this embodiment is provided with a nozzle 36 for supplying a plastic material and an exhaust nozzle 52 in a substantially circular hopper 12 and connected to the nozzle 52. By exhausting with the blower 82, the plastic material is introduced into the hopper 12 from the nozzle 36 and mixed and stirred. Further, a filter part 54 is provided so as to cover the opening 50 to which the exhaust nozzle 52 is connected, and the filter part 54 sucks powder and fine particles separated from the plastic material. Hereinafter, each part will be described in detail.

  The hopper 12 is a place where the plastic materials 30A to 30C (see FIG. 2) introduced into the hopper 12 are mixed and stirred. The hopper 12 sandwiches a substantially ring-shaped side surface 14 having a predetermined width and a substantially circular front surface 16 and The back surface 22 is provided. In the present embodiment, the front surface 16 can be detached from the hopper 12 and has a through hole 17 at a substantially central portion as shown in FIG. The handle 18 attached to the front surface 16 has a flange portion 19, and a screw portion 20 is formed inside the hollow. In the handle 18, the flange portion 19 is fixed to the outer side 16B of the front surface 16 by fixing means such as screws (not shown). On the other hand, a screw shaft 24 is provided at a substantially central portion of the back surface 22 in a direction orthogonal to the back surface 22. The screw shaft 24 passes through the back surface 22 and is fixed to a flange 26 attached to the outside of the back surface 22 by a screw 28. And the front 16 can be detachably attached to the hopper 12 by screwing the screw portion 20 of the handle 18 of the front 16 and the screw shaft 24 together. As the screw shaft 24, for example, one having a diameter of about 6 mm is used.

  For example, SUS or the like is used as the side surface 14 constituting the hopper 12, and tempered glass or the like is used as a material constituting the front surface 16 and the back surface 22, for example. The width of the side surface 14 and the diameters of the front surface 16 and the rear surface 22 are set according to the capacity of the plastic material stocked in the hopper 12. A discharge port 32 for discharging the plastic material is formed below the hopper 12, and a pipe 70 is connected to the discharge port 32. The diameter of the discharge port 32 is, for example, about 50 to 60 mm, and the diameter can be changed as appropriate. A base plate 72 is provided at the tip of the pipe 70. Below the base plate 72, for example, a cylinder of a molding machine is arranged, and the plastic material mixed in the hopper 12 is sent to the cylinder through the discharge port 32 and the pipe 70. The discharge port 32 is provided with a shutter 76 as required (see FIG. 2).

  Further, the side surface 14 is provided with a material introduction opening 34 at a position higher than the discharge port 32, and an opening for exhausting the air in the hopper 12 above the opening 34. A portion 50 is provided. The lower opening 34 is provided with a material supply nozzle 36 that penetrates the opening 34. The nozzle 36 obliquely penetrates the opening 34 so that the tip thereof faces downward, and is connected to a material supply unit (not shown) outside the hopper 12. In this embodiment, the tip portion 38 of the nozzle 36 is formed by cutting the nozzle 36 obliquely with respect to the axial direction. By cutting obliquely in this way, the area of the tip portion 38 can be made larger than the cross section orthogonal to the axial direction of the nozzle 36. The nozzle 36 is installed so as to be inclined at, for example, about 30 ° with respect to the horizontal direction. At this time, the tip portion 38 faces downward and the edge portion of the tip portion 38 is substantially horizontal. Set to

  Further, in the present embodiment, as shown in FIG. 1A, a blocking portion 40 is provided at the tip portion 38 of the nozzle 36 to partially block the opening portion at the tip. In the illustrated example, the closing portion 40 is provided in the middle of the opening of the tip end so as to form plastic material supply ports 42 and 44 on both sides thereof. It should be noted that the extent of the area of the supply ports 42 and 44 may be changed as necessary.

  On the other hand, one end 52A of the exhaust nozzle 52 is connected to the upper opening 50, and a hose 80 is connected to the other end 52B. The hose 80 is connected to an exhaust blower 82 provided outside the hopper 12. A filter portion 54 is provided on the inner side of the hopper 12 with a predetermined length along the side surface 14 so as to cover the opening 50. The filter unit 54 has a two-layer structure with two types of filters 56 and 57. The filter 56 disposed on the opening 50 side is provided with a large number of holes 56A. Since the number of holes 56A through which air passes can be increased by arranging the filter 56 apart from the opening 50 without being in close contact with the opening 50, air resistance can be reduced and suction can be efficiently performed.

  The filter 57 disposed on the center side of the hopper 12 is composed of a plurality of curved bars 58. One end of the bar 58 is fixed at fixed intervals to a fixing pin 59A on one end 62A side of the pair of support portions 60A and 60B. Further, only the bars at both ends of the plurality of bars 58 are fixed to the other end 62B side of the support portions 60A and 60B by the fixing pins 59B on the other end side of the bar 58. Accordingly, as shown in FIG. 1C, the portions other than the bars 58 on both sides can be moved by the air flow in the hopper 12 as indicated by arrows in the figure. The gap 58A between the plurality of bars 58 serves as a filter, but the total area of the holes 56A of the filter 56 is formed larger than the total area of the gap 58A. The diameter of the hole 56A and the gap 58A between the bars 58 can be set as appropriate within a range of, for example, about 1 mm to 5 mm, depending on the shape and dimensions of the plastic material.

Such filters 56 and 57 are supported by a pair of support portions 60A and 60B. The support portions 60A and 60B are formed so as to increase from one end portion 62A toward the other end portion 62B. Therefore, as a whole, the filter portion 54 comes closer to the tip end portion 38 of the supply nozzle 36 as it goes from the end portion 62A to the end portion 62B. The curved surface filter 57 guides the plastic material mixed in the hopper 12 so as to easily come into contact with the plastic material introduced from the tip portion 38 of the supply nozzle 36. Further, a guide portion 66 for guiding the plastic material rotating in the hopper 12 to the filter portion 54 is provided on the end portion 62A side of the pair of support portions 60A and 60B.

  A proximity switch 64 for detecting the plastic material inside is provided outside the back surface 22 of the hopper 12 as described above. The proximity switch 64 is disposed so as to be substantially the same height as the tip end portion 38 of the material supply nozzle 36. As the proximity switch 64, for example, a capacitive proximity switch is used. When the plastic material is not detected by the proximity switch 64, the amount of stock in the hopper is reduced and the plastic material is not supplied from the nozzle 36. Therefore, the timing for replenishing the plastic material can be determined.

  Next, the operation of this embodiment will be described with reference to FIG. FIG. 2A shows a state before the suction by the blower 82 is started, and the discharge port 32 connected to the pipe 70 is closed by a shutter 76. In this state, the plastic material 30A in the hopper 12 is at a lower position than the proximity switch 64, and the introduction of the plastic material from the nozzle 36 is not detected, so it is time to replenish the plastic material. Accordingly, when the proximity switch 64 no longer detects the presence of the plastic material, the plastic material 30B is supplied from the external material supply unit to the nozzle 36 according to the result, and the blower 82 is driven to Start exhaust.

  The plastic material 30 </ b> B supplied to the nozzle 36 naturally falls inside the nozzle 36 installed obliquely and is introduced into the hopper 12 from the two supply ports 42 and 44. Since the inside of the hopper 12 is exhausted by this, it is actively introduced (or transported) by the suction force. Air in the hopper 12 is exhausted from the upper opening 50, and air is introduced from the lower nozzle 36 to the lower side of the hopper 12 together with the plastic material 30B. ) Occurs. For this reason, the plastic material 30B blown downward from the nozzle 36 is blown up along the curved surface of the side surface 14 of the hopper 12 together with the plastic material 30A remaining inside, and rotates inside the hopper 12. It is mixed and stirred while being sprayed on the inner surface of the glass or colliding with each other with plastic materials (see FIG. 2 (B)). In addition, by stirring while colliding, powders and fine particles adhering to the plastic materials 30A and 30B or entering the gaps between the materials are separated from the plastic materials 30A and 30B.

  During such mixing, the plastic materials 30A and 30B and the powder / fine particles separated therefrom collide with the filter portion 54 that is guided by the guide portion 66 and covers the opening portion 50, and the bar 58 of the upper layer filter 57. Only powder and fine particles smaller than the gap 58 </ b> A pass through the filter 57 together with air, and further pass through the lower layer filter 56 and are discharged to the outside from the opening 50. In the present embodiment, since the filter unit 54 has a two-layer structure, it is possible to prevent the blower 82 from being overloaded due to clogging. When the stock of the mixture of plastic materials is formed as described above (see 30A and 30B indicated by the dotted lines in FIG. 2 (C)), the drive of the blower 82 is stopped, and the shutter as shown in FIG. 2 (C). 76 is opened, and the plastic materials 30A and 30B are sent from the discharge port 32 to the molding machine cylinder. When the proximity switch 64 no longer detects the plastic materials 30A and 30B, the discharge port 32 is closed by the shutter 76, a new plastic material 30C is supplied from the nozzle 36, and exhaust by the blower 82 is started. In the present embodiment, since the front 16 can be removed from the hopper 12, when the mixing apparatus 10 is not used, the front 16 is removed as necessary to clean the inside of the hopper 12.

As described above, according to the first embodiment, the plastic material discharge port is provided below the hopper 12 including the substantially ring-shaped side surface 14 and the substantially circular front surface 16 and back surface 22, and the plastic material is disposed on the side surface 14. An opening 34 and a nozzle 36 for introduction are provided above the discharge port 32, and an exhaust opening 50 and a nozzle 52 are provided above the opening 34. Then, the filter portion 54 is provided inside the hopper 12 so as to cover the opening 50, and the proximity switch 64 for detecting the presence or absence of the plastic material is provided above the discharge port 32. There is an effect like this.
(1) Plastic material can be introduced into the hopper 12 and mixed and stirred by exhausting by the blower 82 connected to the exhaust nozzle 52.
(2) The structure utilizing the shape of the substantially circular hopper 12 makes it possible to efficiently introduce, mix and agitate the plastic material even with a small suction force (air transport force). Further, no power other than the blower 82 is required.

(3) By providing the proximity switch 64 at the same height as the tip portion 38 of the nozzle 36, the plastic material in the hopper 12 has become a predetermined amount or less, including whether or not the plastic material is supplied from the nozzle 36. Can be detected.
(4) When the plastic material rotates in the hopper 12, the powder and fine particles adhering to the plastic material or entering the gap can be separated using centrifugal force. Since the separated powder and fine pieces are sucked by the filter unit 54, the defective rate of the molded product can be reduced. Further, collision with the filter unit 54 also promotes separation of powder and fine particles.
(5) The filter portion 54 is formed with a predetermined length along the side surface 14, and one end thereof is formed higher than the other end. By moving along the filter portion 54 having such a shape, the plastic material is guided so as to drop to the upper portion of the tip portion 38 of the nozzle 36, and easily collides with the newly supplied plastic material. The effect can be further enhanced. Further, by providing the guide portion 66 on the upper portion of the filter portion 54 and guiding the plastic material to the filter portion 54, the separation effect can be enhanced.

(6) Since the filter portion 54 has a two-layer structure of the filter 57 having gaps 58A between the plurality of bars 58 and the filter 56 having a large number of holes 56A, the clogging of the filter is prevented, and the blower 82 Can be prevented from being overloaded.
(7) Since the front face 16 can be removed from the hopper 12, the inside can be easily cleaned.
(8) By horizontally cutting the tip portion 38 of the nozzle 36 that is obliquely penetrated, the cross-sectional area is increased, and a part of the cut surface is closed by the closing portion 40 to form two supply ports 42 and 44. Therefore, since the plastic material is introduced, the materials are easily mixed as compared with the case where the plastic material is introduced from one place.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. In addition, the same code | symbol shall be used for the component which is the same as that of Example 1 mentioned above, or respond | corresponds. FIG. 3 is an external perspective view showing the overall configuration of the mixing apparatus according to the second embodiment. In the first embodiment described above, the exhaust opening and the nozzle are provided on the side surface 14 of the hopper 12, but this embodiment is an example in which the exhaust opening and the nozzle are provided in the substantially central portion of the back surface 22. As shown in FIG. 3, in the mixing apparatus 100 of the present embodiment, an exhaust opening 102 is provided at a substantially central portion of the back surface 22 of the hopper 12. One end 104 </ b> A of an exhaust nozzle 104 is connected to the opening 102. The other end 104 </ b> B of the nozzle 104 is connected to the blower 82 via a hose 80.

  A substantially rectangular flange portion 106 is provided at the end portion 104 </ b> A of the nozzle 104, and an opening portion 106 </ b> A having substantially the same shape as the opening portion 102 is formed in the flange portion 106. A substantially U-shaped support member 108 is provided on the inner peripheral surface of the opening 106A, and one end side of the screw shaft 24 similar to that of the first embodiment is fixed to the support member 108.

  Further, a filter part 110 is provided at a substantially central part of the hopper 12 so as to cover the opening 102. The filter unit 110 has a two-layer structure of an inner filter 120 and an outer filter 128. The inner filter 120 is closed at the front surface 120A except for the portion through which the screw shaft 24 penetrates, and is fixed to a flange portion 124 having a substantially rectangular shape on the back surface side. Although the filter 120 has a substantially cylindrical shape, the diameter increases from the opening 102 side toward the front surface 120A, and the entire side surface 120B is a tapered surface. A hole 122 is formed in the side surface 120B.

  The outer filter 128 has a hole 130 formed in the side surface 128B, and no hole is formed in the upper surface 128A. The hole 130 is set to be smaller than the hole 122 of the inner filter 120. The filter 128 has a substantially polygonal column shape as a whole, and is disposed outside the filter 120 so as to form a predetermined space between the filter 128 and the substantially cylindrical filter 120. Such a filter 128 is formed by, for example, folding a punching plate in which holes 130 are formed into a polygonal column along a plurality of folds, and closing the holes on the upper surface 128A. In this embodiment, the ends of the folded filter 128 are not closed, and as shown in FIG. 3, the plastic material being mixed is placed on one end side above the tip portion 38 of the nozzle 36 for supplying the plastic material. It is bent so as to be a guide part 132 that guides it to fall.

  A guide portion 140 is provided on the side surface 14 of the hopper 12 above the nozzle 36. The guide portion 140 has a bottom surface 142 for guiding the plastic material so that the plastic material can easily hit the guide portion 132 or fall above the tip portion 38 of the nozzle 36. A notch 144 is provided at the edge of the bottom surface 142. By providing the notch 144, the position of the plastic material falling on the nozzle 36 changes, so that the mixing effect can be further enhanced.

  The nozzle 104 and the filter portion 110 are aligned with the flange portion 106 on the nozzle 104 side and the flange portion 124 on the filter portion 110 side so as to sandwich the back surface 22, and the four corners are fixed with screws or the like (not shown). Part 110 is attached to hopper 12. The front surface 16 is attached to the hopper 12 by screwing the screw portion 20 inside the handle 18 on the front surface 16 to the screw shaft 24 exposed from the filter front surface 120A.

  The operation of the present embodiment is basically the same as that of the first embodiment described above, but the plastic material introduced into the hopper 12 is moved to the central filter section 110 by the guide section 140 when rotating inside. Since it becomes easy to collide, it becomes easy to separate powder and fine particles. Moreover, since it rotates along the guide part 132 of the filter part 110, it collides with the new plastic material supplied from the front-end | tip part 38 of the nozzle 36, and becomes easy to mix. At this time, the hole 130 is not provided in the filter upper surface 128A, but the hole 130 is provided only in the side surface 128B or the guide portion 132, thereby easily colliding with the guide portion 140. The basic effect of the present embodiment is the same as that of the first embodiment described above, but a taper is provided on the filter 120 inside the filter unit 110 and suction is performed by the blower 82 to apply a constant static pressure to the filter 120. As a result, the narrow area of the conical portion has a high flow rate and a high pressure, and the wide area has a low flow rate and a low pressure operation. For this reason, the suction operation of the centrifugal force is generated inside the hopper 12, the flow velocity from the injection of the plastic material from the nozzle 36 is also added, and the centrifugal force for rotating the plastic material in the hopper 12 can be increased. .

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shapes and dimensions shown in the above embodiments are examples, and may be appropriately changed as necessary. Moreover, the material which comprises each part is an example, and as long as there exists the same effect, you may use a well-known various material.
(2) The positions of the openings 34 and 50, the degree of inclination of the nozzle 36, the structure and formation range of the filter portion 54, the formation range of the closed portion 40 at the tip of the nozzle 36, etc., are just examples. The design can be changed as appropriate within a range where the same effect can be obtained. The same applies to the second embodiment.
(3) The attachment / detachment mechanism for the front face 16 shown in the above embodiment is also an example, and the design may be changed as appropriate so as to achieve the same effect.

(4) The method of fixing the nozzle 104 and the filter unit 110 shown in the second embodiment is also an example, and the design may be changed as appropriate so as to achieve the same effect.
(5) In the first embodiment, the molding machine cylinder is disposed below the discharge port 32. However, this is also an example, and the molding machine cylinder may be sent to the molding machine cylinder via another mechanism. Further, in the above embodiment, the shutter 76 is provided at the discharge port 32, but this is also an example, and the discharge port 32 and the molding machine or the like are directly connected by the pipe 70, while mixing, stirring, separating, etc. A plastic material may be supplied to a molding machine or the like.
(7) In the first embodiment, fine particles and the like are removed from the air exhausted from the nozzle 52, and then reused and sent to the other nozzle 36, and the air circulation path may be a closed system.
(8) In the above embodiment, the present invention is applied to the transport (introduction), mixing, stirring, separation of deposits, etc. of plastic materials for plastic molding, but this is also an example, and the present invention In addition, the present invention can be applied to all uses of a mixing apparatus in the case where granular or pulverized material is used as a processing material.

According to the present invention, the first opening and the material for introducing the processing material to the side surface provided with the processing material discharge port below the substantially ring-shaped side surface and the substantially circular front and back hoppers. A supply nozzle is provided, and a second opening for exhaust and an exhaust nozzle are provided in the hopper. A filter means for separating powder and fine particles from the processing material guided by the guide means is provided inside the hopper so as to cover the second opening, and whether or not the processing material is present above the discharge port. In addition, a detection means for detecting the above is provided, and the second opening is disposed above the tip of the material supply nozzle. Further, the processing material being rotated in the hopper is guided by the filter means so as to easily come into contact with the processing material supplied from the tip of the material supply nozzle. For this reason, since the shape of the substantially circular hopper can be utilized to efficiently introduce, mix and agitate the processing material with a small air transportation force, the processing material can be applied to the processing material mixing apparatus. In particular, it is possible to use a centrifugal force to facilitate separation of powder and fine particles adhering to and mixed in the processed material and reduce the defective rate of molded products. It is suitable for.

10: Mixing device 12: Hopper 14: Side 16: Front 16A: Inside 16B: Outside 17: Through hole 18: Handle 19: Flange part 20: Screw part 22: Back face 24: Screw shaft 26: Flange 28: Screw 30A-30C : Plastic material (pellet)
32: Discharge port 34: Opening portion 36: Nozzle 38: Tip portion 40: Blocking portion 42, 44: Supply port 50: Opening portion 52: Nozzle 52A, 52B: End portion 54: Filter portion 56, 57: Filter 56A: Hole 58: Bar 58A: Clearance 59A, 59B: Fixing pin 60A, 60B: Support part 62A, 62B: End part 64: Proximity switch 66: Guide part 70: Piping 72: Base plate 76: Shutter 80: Hose 82: Blower 100: Mixing Device 102: Opening 104: Nozzle 104A, 104B: End 106: Flange 106A: Opening 108: Supporting member 110: Filter 120: Filter 120A: Front 120B: Side 122: Hole 124: Flange 126: Opening 128: Filter 128A: Upper surface 128B: Side surface 130: Hole 132: Guide portion 1 0: guide portion 142: bottom 144: notch

Claims (14)

A substantially circular front surface and back surface are provided across a substantially ring-shaped side surface having a predetermined width, and a solid processing material is mixed,
A discharge port for the processed material provided on the lower side of the hopper;
A first opening provided in the side surface for introducing the processing material;
A material supply nozzle that passes through the first opening and introduces a processing material into the hopper;
A second opening for exhaust , which is provided in the hopper and located above the tip of the material supply nozzle ;
An exhaust nozzle having one end connected to the second opening and the other end connected to an exhaust means provided outside the hopper;
It is provided inside the hopper so as to cover the second opening, and separates powder and fine particles from the processing material, and the processed material after separation is supplied from the tip of the material supply nozzle. Filter means for guiding the material to be easily contacted with the processing material,
A guide means provided on a side surface of the hopper and above the filter means, and for guiding a processing material rotating in the hopper to the filter means;
A detecting means provided above the discharge port for detecting the presence or absence of the processed material;
With
The processing material introduced from the material supply nozzle rotates in the hopper along the side surface of the hopper by the suction force of the exhaust unit, and at this time, the processing material is filtered by the guide unit. An apparatus for mixing a processing material, wherein the processing material mixing device is guided to a means, whereby powder and fine particles are separated from the processing material and discharged from the exhaust nozzle .   2. The processing material mixing apparatus according to claim 1, wherein the tip of the material supply nozzle and the detection means are arranged at the same height.   3. The processing material mixing apparatus according to claim 1, wherein the material supply nozzle obliquely penetrates the first opening so that a tip thereof faces downward.   The tip of the material supply nozzle is a cut surface formed so as to be inclined with respect to the axial direction of the material supply nozzle and so that the processing material supply port faces downward. The processing material mixing apparatus according to any one of claims 1 to 3.   5. The processing material mixing apparatus according to claim 4, wherein the cut surface is substantially horizontal.   6. The processing material mixing apparatus according to claim 4 or 5, wherein a blocking portion for closing a part of the cut surface is provided.   7. The processing material mixing apparatus according to claim 6, wherein the closing portion is provided so that a supply port through which the processing material passes is formed on both sides of the closing portion.   The said filter means was formed in predetermined length along the side surface of the said hopper, The mixing apparatus of the processing material as described in any one of Claims 1-7 characterized by the above-mentioned.   The mixing of the processing material according to any one of claims 1 to 7, wherein the filter means is formed in a substantially cylindrical shape in a direction substantially orthogonal to the back surface at a central portion of the back surface of the hopper. apparatus.   10. The processing material mixing apparatus according to claim 9, wherein the filter means has a tapered surface. It said filter means, a filter 2 kinds size or shape is different the passage of the air, according to any one of claims 1 to 10, characterized in that it comprises a laminated structure in which piled into two layers Processing material mixing equipment.   12. The processing material mixing apparatus according to claim 11, wherein an area of an air passage portion of the filter on the second opening side is larger than an area of an air passage portion of the outer filter. 13. The processing material mixing apparatus according to claim 12 , wherein the processing material is guided to the outer filter by the guide means .   14. The processing material mixing apparatus according to claim 1, wherein the processing material is a plastic material for plastic molding.

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