JP2013154308A - Die for pelletizing, pelletizing apparatus, and core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die for pelletizing, a pelletizing apparatus, and a core in which processing, cleaning, and exchange are easy to perform, and a processing cost can be suppressed inexpensively.SOLUTION: A pelleting hole 24 that forms a slit 25 is formed to a raw material pushing surface side 22 of a die for pelletizing. A core 40 is installed into the opening edge 21 and includes: a supporting member 41 formed to be in a plate shape to fit the slit 25 while forming a gap with an opening edge 21; and an axial leg part 42 that is formed from the supporting member 41 to be a coplanar and is suspended to the axial center of a pelleting hole 24. A raw material pushed from the raw material-pushing surface 22 side into the pelleting hole 24 is processed to a cylindrical pellet, and is extruded from a pellet extruding surface 23 side through the gap.

Description

  The present invention relates to a pellet manufacturing die, a pellet manufacturing apparatus, and a core.

  Conventionally, pellets obtained by extruding raw materials such as wood flour and organic compound fertilizer are used for pet litter and livestock feed. These pellets are formed in a hollow shape in order to increase the surface area from the viewpoint of a columnar shape or quick drying properties. A die for processing a raw material into a pellet is used in a pellet manufacturing apparatus for manufacturing such a pellet. As this die, a ring die which is an annular die described in Patent Document 1 below and a flat die which is a disk-shaped die described in Patent Document 2 below are proposed.

  According to the ring die described in Patent Literature 1, pellets are produced by extruding the raw material from the inside to the outside through the die hole by a rolling roller provided inside the die in which a large number of die holes are formed. The die hole is provided with a die chip composed of an intermediate rod base in which a raw material squeezing hole is formed and an intermediate rod connected to the central portion of the intermediate rod base. In the die chip, an intermediate rod base and an intermediate rod are combined by screw means, and are detachably provided in the die hole by a wedge. With this configuration, the raw material is processed into a hollow pellet by the raw material squeezing hole and the intermediate rod.

  On the other hand, according to the flat die described in Patent Document 2, the extrusion roller that contacts the surface of the disk-shaped die rotates on the surface of the die, thereby extruding the raw material to the back surface through the die. The die is laminated so that the first die plate formed with a large number of slits having an arc-shaped cross section and the second die plate formed with a large number of holes are aligned with the slits. Fixed with screws. With this configuration, the raw material is formed into an arc shape by the slit of the first die plate, is formed into an annular shape by the hole of the second die plate, and is processed into a hollow pellet.

Japanese Patent No. 3354103 JP 2006-320239 A

  However, the conventional dies have the following problems.

  According to the ring die described in Patent Document 1, a plurality of parts are required for each die hole, such as an intermediate rod base, an intermediate rod screwed into the intermediate rod base, and a wedge for fitting the die chip into the die hole. In particular, in a ring die for producing small-diameter pellets, it is difficult to process, assemble and replace small parts. Further, since the raw material is clogged in the die hole depending on the type of the raw material, it is necessary to clean the die. However, since this ring die is configured to assemble a plurality of small parts, cleaning becomes difficult. In addition, since most of the opening of the die hole is closed by the intermediate rod base, the raw material squeezing hole cannot be taken widely, and the indentation resistance when the raw material is pushed in becomes large.

  Further, according to the flat die described in Patent Document 2, when the die plate for forming the hole is thin, or when the processing size of the hole is reduced for a small diameter pellet, the arc is caused by the distortion of the plate and the fineness of the work. It becomes difficult to process a hole having a shape.

  Furthermore, since any of the dies requires fine processing, the processing cost becomes expensive.

  The present invention has been proposed in view of the above circumstances. That is, a pellet manufacturing die and a pellet manufacturing apparatus that can simplify processing, replacement, and cleaning, that can reduce processing costs, and that can suppress indentation resistance when the raw material is pushed in. , And the purpose of providing the core.

  In order to achieve the above object, a die for producing pellets according to the present invention penetrates from a raw material pushing surface, which is a side into which raw materials are pushed, to a pellet extrusion surface, which is a side from which the pellets processed from the raw materials are pushed out. In the pellet manufacturing die in which a plurality of pellet forming holes are formed and a core is provided in the pellet forming hole, the pellet forming hole has a slit formed at an opening edge on the raw material pushing surface side, and the core Is composed of a plate-shaped support portion and a shaft leg portion extending in the same plane from the end of the support portion, and the core support portion is fitted into the slit of the pellet forming hole. When the core is installed on the opening edge of the pellet forming hole, a gap is formed between the support portion and the opening edge, and the shaft leg portion is suspended from the axis center of the pellet forming hole. Shi The raw material from the raw material pushing surface is pushed into the pelleting holes, through said air gap is characterized by being extruded as pellets are processed into a cylindrical shape from the pellet extruded surface.

  In addition, the slits are continuous between adjacent opening edges, the core is formed in a long plate shape by connecting a plurality of the support portions, and the shaft leg portions are aligned in the same direction. It is characterized by that.

  In addition, the support portion is fitted into the slit, and the raw material pushing surface side is chamfered.

  Further, a positioning leg portion is formed in the support portion, and a positioning hole into which the positioning leg portion is inserted is formed in the raw material pushing surface.

  The pellet manufacturing apparatus according to the present invention is characterized in that the pellet manufacturing die is provided.

  Further, the core according to the present invention is the same as the support part formed in a plate shape from the end of the support part in the core provided in the plurality of pellet forming holes formed penetrating the pellet manufacturing die. It is characterized by comprising a shaft leg portion extending in a plane.

  The core is characterized in that a plurality of the support portions are connected to each other and formed into a long plate shape, and the shaft leg portions are aligned in the same direction.

  In the pellet manufacturing die according to the present invention, the pellet forming hole is formed with a slit at the opening edge on the raw material pushing surface side, and the core is the same as the plate-shaped support portion from the end of the support portion. A shaft leg portion extending in a plane, and when the support portion of the core is fitted into the slit of the pellet forming hole and the core is installed on the opening edge of the pellet forming hole, the support portion and the opening edge A gap is formed between and the shaft leg part hangs down to the center of the pellet molding hole, and the raw material pushed into the pellet molding hole from the raw material pushing surface side passes through the gap from the pellet extrusion surface side. It was set as the structure processed into the cylinder shape and extruded as a pellet. With this configuration, the pellet manufacturing die is configured only by forming a slit at the opening edge and laying a core on the opening edge. Moreover, since a support part is plate shape, a wide space | gap is formed between opening edges. Therefore, it is possible to simplify the processing of the pellet manufacturing die, the attachment and detachment of the core, and the replacement and cleaning thereof, and the processing cost can be reduced. Furthermore, the indentation resistance when the raw material is pushed into the pellet forming hole can be suppressed.

  In addition, the pellet manufacturing die has slits that are continuous between adjacent opening edges, a core is formed in a long plate shape with a plurality of support portions connected, and shaft leg portions are aligned in the same direction. It is good also as composition to be made. With this configuration, slits that are intermittently formed for each pellet forming hole are continuously formed in a lump. In addition, a plurality of cores are configured as a single component, and the number of components is reduced. Therefore, it is possible to further simplify the processing of the pellet manufacturing die, the attachment / detachment of the core, and the replacement and cleaning thereof, and the processing cost can be further reduced.

  Moreover, a support part is good also as a structure which is fitted to the slit and the raw material pushing surface side is chamfered. With this configuration, the indentation resistance when the raw material is pushed into the pellet forming hole is suppressed, and the raw material is sufficiently pushed into the pellet forming hole. Therefore, it is possible to produce a sufficiently compressed and solid cylindrical pellet with high yield.

  Moreover, it is good also as a structure by which the positioning leg part is formed in a support part and the positioning hole into which this positioning leg part is inserted was formed in the raw material pushing surface. With this configuration, the positioning leg is inserted into the positioning hole to position the core, and the shaft leg is always arranged at the center of the pellet forming hole. Therefore, a cylindrical pellet can be manufactured with a high yield.

  The pellet manufacturing apparatus according to the present invention is configured to include the pellet manufacturing die according to the present invention. Therefore, it is possible to simplify the processing of the pellet manufacturing die, the attachment and detachment of the core, and the replacement and cleaning thereof, and the processing cost can be reduced.

  The core according to the present invention is configured to include a support portion formed in a plate shape and a shaft leg portion extending in the same plane from the end of the support portion. With this configuration, the core is manufactured by cutting and attached to the pellet forming hole alone. Therefore, processing, attachment and detachment of the core, exchange and cleaning thereof can be simplified, and processing costs can be reduced.

  Further, the core according to the present invention may be configured such that a plurality of support portions are connected to each other and formed into a long plate shape, and the shaft leg portions are aligned in the same direction. With this configuration, a plurality of cores are configured as a single component, and the number of components is reduced. Therefore, the attachment / detachment, replacement and cleaning of the core can be further simplified.

It is a figure which shows the die for pellet manufacture which concerns on 1st embodiment of this invention, (a) is a top view, (b) is an AA cross-section front view of (a). It is a figure which shows the core which concerns on 1st embodiment of this invention, (a) is a front view and a side view, (b) is a BB cross-sectional enlarged view of FIG.1 (b), (c) is inside. It is explanatory drawing explaining the state which attached the child to the pellet forming hole. It is a top view which shows the die for pellet manufacture which concerns on 2nd embodiment of this invention. It is a figure which shows the core which concerns on 2nd embodiment of this invention, (a) is a top view, (b) is a front view, (c) is CC sectional enlarged view of (b), and a core It is explanatory drawing explaining the state which attached to the pellet shaping | molding hole. It is the front schematic which shows the outline of the pellet manufacturing apparatus which concerns on 3rd embodiment of this invention.

  A first embodiment according to the invention of a die for producing pellets and the invention of a core provided therein will be described below with reference to the drawings.

  1 (a) and 1 (b), a pellet manufacturing die 20 has a disk shape, and a circular through hole is formed orthogonally at the center. The peripheral surface forming the through hole is the inner peripheral side surface, and the outer periphery of the pellet manufacturing die 20 is the outer peripheral side surface. Moreover, as for the die 20 for pellet manufacture, the surface is the raw material pushing surface 22 which is the side by which a raw material is pushed in, and the back surface is the pellet extrusion surface 23 which is the side by which the pellet processed from the raw material is extruded.

  The raw material pushing surface 22 is formed with an inner peripheral groove 26 and an outer peripheral groove 27 concentric with the pellet manufacturing die 20 on the inner peripheral side surface and the outer peripheral side surface, respectively. For this reason, even when the contact surface with the rotating roller 3 (see FIG. 5) is recessed due to wear, the outer peripheral surface of the roller 3 and its peripheral edge are inside the inner peripheral groove 26 and outside the outer peripheral groove 27. It is possible to prevent the raw material pushing surface 22 from coming into contact with and being damaged. On the pellet extrusion surface 23, a wide groove 28 having a width corresponding to the interval between the inner peripheral groove 26 and the outer peripheral groove 27 and having a substantially rectangular cross section is formed concentrically with the pellet manufacturing die 20. By changing the depth of the wide groove 28, the depth of the pellet forming hole 24 described later is adjusted.

  The pellet manufacturing die 20 is formed with pellet forming holes 24 penetrating perpendicularly to these surfaces from the raw material pushing surface 22 toward the pellet extrusion surface 23. A plurality of pellet forming holes 24 are formed and aligned in the circumferential direction and the radial direction of the pellet manufacturing die 20. That is, the pellet forming holes 24 are formed along the circumference of a concentric circle with the pellet manufacturing die 20, are arranged in a circular shape, and are formed in multiples between the inner peripheral groove 26 and the outer peripheral groove 27. It is formed along a plurality of concentric circles.

  The pellet forming hole 24 has a substantially cylindrical shape, and is formed in a tapered shape in which the diameter of the raw material pushing surface 22 is gradually reduced in the axial direction (see FIG. 2B). Further, the pellet forming hole 24 has a slit 25 formed in the opening edge 21 on the raw material pushing surface 22 side, and the opening edge 21 is partially enlarged by the slit 25 as described later. The number and shape of the pellet forming holes 24 can be changed as appropriate.

  When the pellet forming hole 24 is viewed in plan, the slits 25 are formed on the opening edge 21 as a pair facing each other with the pellet forming hole 24 as the center. The slit 25 is formed in a substantially convex shape toward the adjacent opening edges 21 adjacent to each other on the circumference of the pellet manufacturing die 20. Moreover, the front-end | tip of a substantially protruding item | line is formed in R shape. The slit 25 is formed in a rectangular shape when the pellet forming hole 24 is viewed from the front (or from the side) (see FIG. 2B).

  The slit 25 has a width (corresponding to the width of the core 40 described later (excluding the R shape)) approximately 1.25 times the diameter of the opening edge 21 and a thickness (corresponding to the thickness of the core 40). The diameter of the edge 21 is about 0.25 times, and the depth (the length in the axial direction of the pellet forming hole 24) is about 0.3 times the total length of the pellet forming hole 24. More specifically, a slit having a width of 8 mm (9.5 mm including the R shape), a thickness of 1.5 mm, and a depth of 4 mm is formed in a pellet forming hole having an opening edge diameter of 6.4 mm and a total length of 13 mm. . The slit 25 is formed by an end mill or the like, and the width and the like can be changed as appropriate.

  In FIG. 2A, the core 40 attached to the pellet forming hole 24 is constricted on the same plane from the center of the end of the support 41 and the support 41 formed in a substantially square shape. It is a substantially T-shaped plate-shaped piece composed of an extended shaft leg portion 42. A flat portion 43 is formed on the side of the support portion 41 opposite to the side on which the shaft leg portion 42 is formed. The support portion 41 is formed so that the thickness and height thereof are substantially the same as the thickness and depth of the slit 25, respectively, and the width is shorter than the width of the slit 25 with an R shape at the tip. The shaft leg portion 42 is formed in a rod shape, and its length is about 2.5 times the height of the support portion 41.

  More specifically, the core 40 has a support portion 41 having a width of 8 mm, a thickness of 1.5 mm, a height of 3.7 mm, and a shaft leg portion having a width of 1.6 mm, a thickness of 1.5 mm, and a height. The total length is 9.3 mm and 13 mm. The width and the like can be changed as appropriate.

  2B and 2C, the core 40 is attached to the pellet forming hole 24. The support portion 41 is fitted into the slit 25 and is laid over the opening edge 21 in an I shape in plan view. The opening edge 21 is vertically cut in half by the support portion 41 between the inner peripheral side surface side and the outer peripheral side surface side of the pellet manufacturing die 20, and a gap is formed between the support portion 41 and the opening edge 21 (FIG. 1). (Refer to (a) and (b)). The flat portion 43 is aligned with the opening edge 21 and is substantially flush with the raw material pushing surface 22. The shaft leg portion 42 is arranged at the axial center of the pellet forming hole 24, and the tip is aligned with the opening edge of the pellet forming hole 24 on the pellet extrusion surface 23 side. The pellet forming hole 24 to which the core 40 is attached has two semi-annular shapes in which the raw material pushing surface 22 side is divided into two by a support portion 41, and the middle to the pellet extrusion surface 23 are centered on the shaft leg portion 42. The gaps are formed in a ring shape.

  The core 40 is removed from the pellet forming hole 24 by turning the front and back of the pellet manufacturing die 20 upside down. In addition, you may remove using tools, such as a radio pliers.

  As described above, the pellet manufacturing die 20 and the core 40 provided in the pellet manufacturing die 20 are configured.

  Next, a second embodiment according to the invention of the pellet manufacturing die and the invention of the core provided therein will be described with reference to the drawings. Here, only the configuration different from the first embodiment will be described, and the description of the same configuration will be omitted.

  In FIG. 3, the annular slit 35 is formed concentrically with the pellet manufacturing die 30. That is, the slit formed in the opening edge 21 of the pellet forming hole 24 in the first embodiment is connected between the opening edges 21 adjacent in the circumferential direction. The annular slit 35 is formed by a lathe or the like.

  A positioning hole 39 is formed in the annular slit 35 between the opening edges 31 adjacent on the circumference. The positioning holes 39 are formed for each concentric circle formed in multiples at intervals that divide the circle into approximately four equal parts.

  In FIG. 4A, the fan-shaped core 50 has a longitudinal fan-shaped support portion 51 that extends in the width direction in plan view and is curved in an arc shape of approximately 90 degrees. In FIG. A multi-axis leg portion 52 that is suspended from the end of the fan-shaped support portion 51 is formed. The multi-axis leg portion 52 is composed of a plurality of shaft leg portions that are orthogonal to the fan-shaped support portion 51 and are formed at substantially equal intervals in the same direction. That is, the plurality of support portions 41 in the first embodiment are connected in an arc shape to form a long plate shape, and the shaft leg portions 42 are aligned in the same direction.

  In FIG. 4B, a positioning leg 59 is formed in the vicinity of one end of the fan-shaped support part 51 so as to hang down in the same direction as the multi-axis leg part 52. 4C, the fan-shaped support portion 51 has a chevron 53 formed by chamfering the edge of the end opposite to the side on which the multiaxial leg portion 52 is formed. The chevron 53 is formed in a chevron shape in the longitudinal section of the fan-shaped support 51 in the thickness direction.

  3 and 4, the fan-shaped core 50 corresponds to approximately a quarter of the total number of the pellet forming holes 34 adjacent on the circumference of the pellet manufacturing die 30. When the fan-shaped core 50 is attached to the pellet forming hole 34, the fan-shaped support portion 51 fills the annular slit 35 formed in a circular shape, and the positioning leg portion 59 is inserted into the positioning hole 39 of the annular slit 35. A plurality of fan-shaped cores 50 are attached and circle around the annular slit 35 to be circular. In the fan-shaped support portion 51, only the tip edge of the mountain-shaped portion 53 is aligned with the opening edge 31 at the opening edge 31, and the inclined surface is inclined in the axial direction of the pellet forming hole 34. Further, in the annular slit 35, only the leading edge of the mountain-shaped portion 53 is aligned with the raw material pushing surface 32, and the inclined surface is inclined in the depth direction of the annular slit 35.

  As described above, the pellet manufacturing die 30 and the fan-shaped core 50 provided in the pellet manufacturing die 30 are configured.

  In the first and second embodiments, the flat die has been described. However, a ring die may be used. In this case, the pellet manufacturing die is formed in an annular shape having a predetermined width in the axial direction, and the inner side surface serves as a surface for pushing in the raw material, and the outer side surface serves as a surface for pushing out the pellet. This pellet manufacturing die is formed with a pellet forming hole penetrating in the radial direction from the surface side into which the raw material is pushed in to the side from which the pellet is extruded. A plurality of pellet forming holes are formed and aligned in the circumferential direction and the axial direction.

  The core is also processed according to this annular die for producing pellets. That is, if necessary, the support part is formed by bending the flat part into a concave arc along the surface into which the raw material is pushed. In addition, the fan-shaped core is formed by bending the fan-shaped support portion in a concave arc shape when viewed from the front, and the multi-axis leg portions 52 hanging radially at substantially equal intervals along the concave arc shape.

  Next, 3rd embodiment which concerns on invention of the pellet manufacturing apparatus using the die | dye for pellet manufacture is described based on drawing. In this embodiment, the pellet manufacturing die 20 is used, but a pellet manufacturing die 30 may be used. Moreover, since the description of the structure of the pellet manufacturing dies 20 and 30 is as described above, the description thereof is omitted.

  In FIG. 5, the pellet manufacturing apparatus 10 according to the present embodiment is configured such that the exterior includes a frame 1 and a cover 2 provided at the upper end of the frame 1 so as to be openable and closable. A chute 7 is provided on the side surface of the frame 1, and a hopper (not shown) is provided on the upper end of the cover 2. The drive main shaft 6 is covered with an exterior, and extends vertically. The pellet manufacturing die 20, the roller 3 in contact with the raw material pushing surface 22, the cutter 4 whose blade is directed to the pellet extrusion surface 23, and the pellet discharge disc 5 provided below the cutter 4 are each driven at its center. 6 is provided on the same axis. In addition, a driving power source (not shown) for driving the driving spindle 6 is provided inside or outside the frame 1.

  The cover 2 is formed in a substantially cylindrical shape, and when opened, the roller 3 and the pellet manufacturing die 20 can be seen. A hopper communicated with the upper end of the cover 2 is formed in a funnel shape having a conical shape or a polygonal pyramid shape. The chute 7 is formed in a slide-like shape inclined downward so that the pellet can be discharged by its own weight.

  The drive main shaft 6 is provided with a roller support base 8 for supporting the roller 3, a pellet manufacturing die 20, a cutter 4, and a discharge disk 5 in order from the upper end side. The roller support base 8, the cutter 4 and the discharge disk 5 are fixed to the drive main shaft 6 by bolts or the like, while the pellet manufacturing die 20 is placed on a pedestal (not shown) and is prevented from rotating from the side by a bolt. The drive main shaft 6 is rotated by the rotational force transmitted from the drive power source. Along with the rotation of the drive main shaft 6, the roller 3, the cutter 4 and the discharge disk 5 rotate around the drive main shaft 6. On the other hand, the pellet manufacturing die 20 is placed on a pedestal and does not rotate.

  The roller support 8 is formed on the side surface so that two roller shafts (not shown) are axisymmetric. The roller shaft is inclined upward toward the tip and is provided with a roller 3.

  The roller 3 is a substantially conical disk, and a machining groove (not shown) extending in the thickness direction is formed on the outer peripheral surface. The roller 3 is rotatably supported by a roller shaft in a state where the outer peripheral surface is in contact with the raw material pushing surface 22 of the pellet manufacturing die 20.

  The cutter 4 has a diameter substantially the same as that of the pellet production die 20 and is provided so as to face the pellet extrusion surface 23 side.

  The discharge disk 5 has a diameter substantially the same as that of the pellet manufacturing die 20, and is provided at substantially the same height as the chute 7 through the frame 1.

  The pellet manufacturing apparatus 10 is configured as described above.

  Next, the operation of the core 40, the pellet manufacturing die 20, and the pellet manufacturing apparatus 10 will be described based on the drawings together with the pellet manufacturing method.

  In FIG. 5, the driving power source is driven to operate the pellet manufacturing apparatus 10. When the pellet manufacturing apparatus 10 is operated and the drive main shaft 6 is rotated, the roller 3, the cutter 4 and the discharge disk 5 fixed to the drive main shaft 6 are rotated. The roller 3 revolves around the drive main shaft 6 while rotating around the roller shaft, and rolls on the raw material pushing surface 22 of the pellet manufacturing equipment die 20. In this state, raw materials are supplied to the hopper. The raw material supplied to the hopper falls in the cover 2 connected to the hopper and is accumulated on the raw material pushing surface 22.

  The rotating roller 3 scrapes the accumulated raw material in a groove formed on the outer peripheral surface, and pushes it into the pellet forming hole 24 while pressing it against the raw material pushing surface 22. The raw material pushed into the pellet forming hole 24 is turned into two semi-annular gaps (see FIG. 2C) formed between the support portion 41 and the opening edge 21 by attaching the core 40. Pushed in. In the pellet forming hole 24, the raw material is divided by the support portion 41 on the raw material pushing surface 22 side, and is merged in the middle to form a cylindrical shape with the shaft leg portion 42 as the center of the shaft. The cylindrical pellets are extruded in a line from the pellet extrusion surface 23 side.

  The cutter 4 that rotates about the rotation main shaft 6 cuts the pellets in a line shape into an appropriate length. The cut pellets fall onto the discharge disk 5 that rotates about the rotation main shaft 6. The discharge disk 5 blows the pellets in the radial direction by the centrifugal force generated by the rotation, and discharges them outside the frame 1. The discharged pellet slides down along the chute 7.

  Then, a pellet is completed through a cooling device, a shaking device, or the like.

  Here, when pellets are manufactured using the pellet manufacturing die 20 provided with the core 40, the flat portion 43 of the support portion 41 is aligned with the opening edge 21 and is flush with the raw material pushing surface 22. (See FIG. 2C). That is, the pellet forming hole 24 receives the raw material by the flat portion 43 of the support portion 41 at the opening edge 21.

  On the other hand, according to the pellet manufacturing die 30 provided with the fan-shaped support portion 51, the fan-shaped support portion 51 is chamfered and only the front end edge of the mountain-shaped portion 53 is aligned with the opening edge 31 (see FIG. 4C). ). That is, the pellet forming hole 34 receives the raw material at the opening edge 31 with a “line” that is the leading edge of the chevron 53 of the fan-shaped support 51. Therefore, the chamfering of the support portion further suppresses the pushing resistance to the pellet forming hole 34.

  Further, if the positioning leg portion 59 is inserted into the positioning hole 39 to position the fan-shaped core 50, the fan-shaped core 50 does not shift in the circumferential direction using the circular slit 35 formed in a circular shape as a rail. The shaft leg portion 52 does not deviate from the axial center of the pellet forming hole 34.

  As described above, according to the first embodiment, the pellet forming hole 24 has the slit 25 formed in the opening edge 21 on the raw material pushing surface 22 side. The core 40 is composed of a support portion 41 that is formed in a plate shape with a substantially square shape, and a shaft leg portion 42 that is formed by constricting on the same plane from the center of the end of the support portion 41. It is a substantially T-shaped plate-shaped piece.

  With this configuration, the core 40 is manufactured by cutting and attached to the pellet forming hole 24 alone. The pellet manufacturing die 20 is configured only by forming the slit 25 in the opening edge 21 and laying the core 40 on the opening edge 21. Therefore, the processing of the core 40 and the pellet manufacturing die 20, the attachment and detachment of the core 40, and the replacement and cleaning thereof can be simplified, and the processing cost can be reduced. Furthermore, the slit 25 can be easily formed in an existing pellet manufacturing die by an end mill or the like, and the core 40 can be attached to the slit 25 later.

  And according to 1st embodiment, the support part 41 is fitted by the slit 25, and since the space | gap is formed between the support part 41 and the opening edge 21, the core 40 is made into the opening edge 21. The flat part 43 is aligned with the opening edge 21 and is substantially flush with the raw material pushing surface 22. Then, the shaft leg portion 42 hangs down from the center of the pellet forming hole 24, and the raw material pushed into the pellet forming hole 24 from the raw material pushing surface side 22 is processed into a cylindrical shape through the gap, and the pellet pushing surface side 23 It is the structure which extrudes as a pellet from.

  With this configuration, the space of the flat portion 43 in the pellet forming hole 24 is minimized, and a wide space is formed between the opening edge 21 and the pushing resistance when the raw material is pushed into the pellet forming hole 24 is reduced. It can be suppressed. Therefore, raw materials can be sufficiently supplied, and high-density and firm cylindrical pellets can be manufactured with high yield.

  Further, the core 40 having the support portion 41 installed on the opening edge 21 is removed from the pellet forming hole 24 by turning the front and back of the pellet manufacturing die 20 upside down. Therefore, the core 40 can be easily removed during replacement or cleaning.

  As described above, according to the second embodiment, the annular slit 35 is formed by connecting the slits formed in the opening edge 31 of the pellet forming hole 34 between the opening edges 31 adjacent in the circumferential direction. It is formed concentrically with the manufacturing die 30. Further, the fan-shaped core 50 has a multi-axis in which a long fan-shaped support portion 51 extending in the width direction in a plan view is curved in an arc shape and constricted on the same plane from the end of the fan-shaped support portion 51 in a front view. The leg portions 52 are orthogonal to the fan-shaped support portions 51 and are formed at substantially equal intervals in the same direction.

  With this configuration, the slits that are intermittently formed for each pellet forming hole are collectively formed continuously as the annular slit 35. Further, since the fan-shaped core 50 is configured as a single component in which a plurality of cores are grouped, the number of components is reduced. Therefore, the processing of the pellet manufacturing die 30, the attachment and detachment of the fan-shaped core 50, and the replacement and cleaning thereof can be further simplified, and the processing cost can be further reduced.

  Further, the fan-shaped core 50 is formed by connecting the cores 40 corresponding to approximately one quarter of the total number of the pellet forming holes 34 adjacent on the circumference of the pellet manufacturing die 30, and approximately 90 degrees. It is curved in an arc shape. With this configuration, the fan-shaped core 50 can be easily attached and detached horizontally with respect to the pellet manufacturing die. Therefore, attachment / detachment, replacement, and cleaning of the fan-shaped core 50 can be further simplified.

  In addition, the fan-shaped support portion 51 has an edge at the end opposite to the side on which the multi-axis leg portion 52 is formed, chamfered in a mountain shape in the longitudinal cross section in the thickness direction of the fan-shaped support portion 51, Is formed. With this configuration, the fan-shaped support portion 51 is such that only the front end edge of the mountain-shaped portion 53 is aligned with the opening edge 31, and the inclined surface is inclined in the axial direction of the pellet forming hole 34 from the raw material pushing surface 32. That is, since the pellet forming hole 34 receives the raw material at the opening edge 31 by the “line” which is the leading edge of the chevron 53 of the fan-shaped support portion 51, the pushing resistance to the pellet forming hole 34 is suppressed, and the raw material is It is pushed in enough. Therefore, it is possible to produce a sufficiently compressed and solid cylindrical pellet with high yield.

  The fan-shaped core 50 has a positioning leg portion 59 near one end of the fan-shaped support portion 51. A positioning hole 39 is formed in the annular slit 35 between the opening edges 31 adjacent on the circumference. With this configuration, the positioning leg 59 is inserted into the positioning hole 39 to position the fan-shaped core 50, and the multi-axis leg 52 is always arranged at the center of the pellet forming hole 34. Therefore, a cylindrical pellet can be manufactured with a high yield.

  As described above, in the third embodiment, the pellet manufacturing die 20 or the pellet manufacturing die 30 described above is provided. Therefore, it is possible to simplify the processing of the pellet manufacturing dies 20 and 30, the attachment and detachment of the cores 40 and 50, and the replacement and cleaning thereof, and the processing cost can be reduced.

  As a modification of the embodiment of the above-described pellet manufacturing die, the slit may be formed in the radial direction or other directions, and may be connected in the radial direction or other directions. In connection with this, it is good also as a structure to which a core is continued along the slit of this modification. However, for the convenience of processing, a configuration in which slits are formed in the circumferential direction and connected as in the present embodiment is preferable.

  The core may be formed of a flexible material and may be attached to the pellet forming hole along the slit while being freely deformed.

  Moreover, the support part should just be the structure by which the axial leg part suspended from the support part is arrange | positioned in the axial center of a pellet shaping | molding hole. For example, it may be a support portion having a cross shape or a Y shape in plan view. However, since the space of the support portion is minimized and the gap formed between the opening edge 21 can be widened, a flat portion or a chevron portion that is straight when viewed in plan is formed as in this embodiment. The structure used as the support part is preferable.

  Further, the core may have a structure in which the support portion is formed in a rod shape and is installed on the opening edge. However, it is preferable that it is plate-like like this embodiment from fitting stability.

  Further, a plurality of positioning leg portions may be formed, and the configuration may be such that the positioning leg portions are formed at arbitrary positions between the multi-axis leg portions of the sector support portion. However, for the convenience of processing, a configuration in which it is formed near one end as in the present embodiment is preferable.

  Moreover, the structure by which the core and the pellet formation hole were integrally molded may be sufficient. However, the structure which can be attached or detached like this embodiment for the convenience of a process and the ease of replacement | exchange or cleaning is preferable.

  Further, the fan-shaped core may have a sector shape formed at approximately 90 degrees or less, or approximately 90 degrees or more, or an annular shape formed at 360 degrees. However, for convenience of processing and ease of attachment / detachment, as in this embodiment, among the pellet forming holes 34 adjacent on the circumference of the pellet manufacturing die 30, it corresponds to approximately a quarter of the total number. A configuration in which the cores 40 are formed continuously and curved in an arc shape of approximately 90 degrees is preferable.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment. The present invention can be modified in various ways without departing from the scope of the claims. Examples of raw materials for pellets produced according to the present invention include chicken manure compost, waste plastic, sludge, PVC shavings, wood powder, resin, plastic bottle labels, organic compound fertilizer, charcoal, paper sludge, and paper diapers. Examples of the use of pellets produced from these raw materials include compost, cat sand, livestock feed, various fertilizers, solid fuel, and volume reduction solidification of various industrial wastes.

DESCRIPTION OF SYMBOLS 1 Frame 2 Cover 3 Roller 4 Cutter 5 Discharge disk 6 Drive spindle 7 Chute 8 Roller base 10 Pellet manufacturing device 20, 30 Pellet manufacturing dies 21, 31 Open edge 22, 32 Raw material pushing surface 23 Pellet extrusion surface 24, 34 Pellet Molding hole 25 Slit 26 Inner peripheral groove 27 Outer peripheral groove 28 Wide groove 35 Annular slit 39 Positioning hole 40 Core 41 Support part 42 Shaft leg part 43 Flat part 50 Fan-shaped core 51 Fan-shaped support part 52 Multi-axis leg part 53 Angle part 59 Positioning leg

Claims (7)

A plurality of pellet forming holes penetrating from the raw material pushing surface, which is the side into which the raw material is pushed, to the pellet pushing surface, which is the side from which the pellets processed from the raw material are pushed out, are formed. In the pellet manufacturing die provided,
The pellet forming hole is formed with a slit at the opening edge on the raw material pushing surface side,
The core is composed of a support portion formed in a plate shape, and a shaft leg portion extending in the same plane from the end of the support portion,
When the support portion of the core is fitted into the slit of the pellet forming hole and the core is installed on the opening edge of the pellet forming hole, a gap is formed between the support portion and the opening edge. And the shaft leg part hangs down to the axis center of the pellet forming hole,
The raw material pushed into the pellet forming hole from the raw material pushing surface side is processed into a cylindrical shape from the pellet pushing surface side and extruded as a pellet through the gap.
A die for producing pellets. The slits are continuous between adjacent opening edges;
The core is formed in a long plate shape by connecting a plurality of the support portions, and the shaft leg portions are aligned in the same direction.
The die for producing pellets according to claim 1. The support portion is fitted into the slit, and the raw material pushing surface side is chamfered,
The die for producing pellets according to claim 1 or 2, characterized by the above-mentioned. A positioning leg is formed on the support,
A positioning hole into which the positioning leg is inserted is formed in the raw material pushing surface,
The pellet manufacturing die according to any one of claims 1 to 3, wherein the die is used for manufacturing a pellet. A pellet manufacturing die according to any one of claims 1 to 4 is provided.
The pellet manufacturing apparatus characterized by the above-mentioned. In the core provided in a plurality of pellet forming holes formed through the die for pellet production,
A support portion formed in a plate shape;
A shaft leg extending in the same plane from the end of the support,
Composed of,
A core characterized by that. A plurality of the support portions are connected and formed in a long plate shape, and the shaft leg portions are aligned in the same direction.
The core according to claim 6.

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